2838 lines
83 KiB
C++
2838 lines
83 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "Accessible-inl.h"
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#include "nsIXBLAccessible.h"
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#include "AccCollector.h"
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#include "AccGroupInfo.h"
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#include "AccIterator.h"
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#include "nsAccUtils.h"
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#include "nsAccessibilityService.h"
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#include "ApplicationAccessible.h"
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#include "nsEventShell.h"
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#include "nsTextEquivUtils.h"
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#include "DocAccessibleChild.h"
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#include "Relation.h"
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#include "Role.h"
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#include "RootAccessible.h"
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#include "States.h"
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#include "StyleInfo.h"
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#include "TableAccessible.h"
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#include "TableCellAccessible.h"
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#include "TreeWalker.h"
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#include "nsIDOMElement.h"
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#include "nsIDOMNodeFilter.h"
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#include "nsIDOMHTMLElement.h"
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#include "nsIDOMKeyEvent.h"
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#include "nsIDOMTreeWalker.h"
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#include "nsIDOMXULButtonElement.h"
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#include "nsIDOMXULDocument.h"
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#include "nsIDOMXULElement.h"
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#include "nsIDOMXULLabelElement.h"
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#include "nsIDOMXULSelectCntrlEl.h"
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#include "nsIDOMXULSelectCntrlItemEl.h"
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#include "nsPIDOMWindow.h"
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#include "nsIDocument.h"
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#include "nsIContent.h"
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#include "nsIForm.h"
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#include "nsIFormControl.h"
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#include "nsContentUtils.h"
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#include "nsDeckFrame.h"
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#include "nsLayoutUtils.h"
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#include "nsIPresShell.h"
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#include "nsIStringBundle.h"
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#include "nsPresContext.h"
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#include "nsIFrame.h"
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#include "nsView.h"
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#include "nsIDocShellTreeItem.h"
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#include "nsIScrollableFrame.h"
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#include "nsFocusManager.h"
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#include "nsXPIDLString.h"
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#include "nsUnicharUtils.h"
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#include "nsReadableUtils.h"
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#include "prdtoa.h"
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#include "nsIAtom.h"
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#include "nsIURI.h"
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#include "nsArrayUtils.h"
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#include "nsIMutableArray.h"
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#include "nsIObserverService.h"
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#include "nsIServiceManager.h"
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#include "nsWhitespaceTokenizer.h"
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#include "nsAttrName.h"
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#ifdef DEBUG
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#include "nsIDOMCharacterData.h"
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#endif
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#include "mozilla/Assertions.h"
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#include "mozilla/BasicEvents.h"
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#include "mozilla/EventStates.h"
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#include "mozilla/FloatingPoint.h"
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#include "mozilla/MouseEvents.h"
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#include "mozilla/unused.h"
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#include "mozilla/Preferences.h"
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#include "mozilla/dom/CanvasRenderingContext2D.h"
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#include "mozilla/dom/Element.h"
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#include "mozilla/dom/HTMLCanvasElement.h"
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#include "mozilla/dom/TreeWalker.h"
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using namespace mozilla;
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using namespace mozilla::a11y;
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////////////////////////////////////////////////////////////////////////////////
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// Accessible: nsISupports and cycle collection
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NS_IMPL_CYCLE_COLLECTION(Accessible,
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mContent, mParent, mChildren)
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NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(Accessible)
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if (aIID.Equals(NS_GET_IID(Accessible)))
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foundInterface = this;
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else
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NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, Accessible)
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NS_INTERFACE_MAP_END
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NS_IMPL_CYCLE_COLLECTING_ADDREF(Accessible)
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NS_IMPL_CYCLE_COLLECTING_RELEASE_WITH_DESTROY(Accessible, LastRelease())
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Accessible::Accessible(nsIContent* aContent, DocAccessible* aDoc) :
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mContent(aContent), mDoc(aDoc),
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mParent(nullptr), mIndexInParent(-1), mChildrenFlags(eChildrenUninitialized),
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mStateFlags(0), mContextFlags(0), mType(0), mGenericTypes(0),
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mRoleMapEntry(nullptr)
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{
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mBits.groupInfo = nullptr;
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mInt.mIndexOfEmbeddedChild = -1;
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}
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Accessible::~Accessible()
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{
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NS_ASSERTION(!mDoc, "LastRelease was never called!?!");
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}
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ENameValueFlag
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Accessible::Name(nsString& aName)
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{
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aName.Truncate();
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if (!HasOwnContent())
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return eNameOK;
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ARIAName(aName);
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if (!aName.IsEmpty())
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return eNameOK;
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nsCOMPtr<nsIXBLAccessible> xblAccessible(do_QueryInterface(mContent));
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if (xblAccessible) {
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xblAccessible->GetAccessibleName(aName);
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if (!aName.IsEmpty())
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return eNameOK;
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}
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ENameValueFlag nameFlag = NativeName(aName);
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if (!aName.IsEmpty())
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return nameFlag;
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// In the end get the name from tooltip.
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if (mContent->IsHTMLElement()) {
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if (mContent->GetAttr(kNameSpaceID_None, nsGkAtoms::title, aName)) {
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aName.CompressWhitespace();
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return eNameFromTooltip;
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}
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} else if (mContent->IsXULElement()) {
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if (mContent->GetAttr(kNameSpaceID_None, nsGkAtoms::tooltiptext, aName)) {
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aName.CompressWhitespace();
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return eNameFromTooltip;
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}
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} else if (mContent->IsSVGElement()) {
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// If user agents need to choose among multiple ‘desc’ or ‘title’ elements
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// for processing, the user agent shall choose the first one.
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for (nsIContent* childElm = mContent->GetFirstChild(); childElm;
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childElm = childElm->GetNextSibling()) {
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if (childElm->IsSVGElement(nsGkAtoms::desc)) {
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nsTextEquivUtils::AppendTextEquivFromContent(this, childElm, &aName);
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return eNameFromTooltip;
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}
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}
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}
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if (nameFlag != eNoNameOnPurpose)
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aName.SetIsVoid(true);
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return nameFlag;
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}
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void
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Accessible::Description(nsString& aDescription)
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{
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// There are 4 conditions that make an accessible have no accDescription:
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// 1. it's a text node; or
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// 2. It has no DHTML describedby property
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// 3. it doesn't have an accName; or
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// 4. its title attribute already equals to its accName nsAutoString name;
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if (!HasOwnContent() || mContent->IsNodeOfType(nsINode::eTEXT))
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return;
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nsTextEquivUtils::
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GetTextEquivFromIDRefs(this, nsGkAtoms::aria_describedby,
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aDescription);
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if (aDescription.IsEmpty()) {
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bool isXUL = mContent->IsXULElement();
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if (isXUL) {
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// Try XUL <description control="[id]">description text</description>
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XULDescriptionIterator iter(Document(), mContent);
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Accessible* descr = nullptr;
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while ((descr = iter.Next())) {
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nsTextEquivUtils::AppendTextEquivFromContent(this, descr->GetContent(),
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&aDescription);
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}
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}
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if (aDescription.IsEmpty()) {
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// Keep the Name() method logic.
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if (mContent->IsHTMLElement()) {
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mContent->GetAttr(kNameSpaceID_None, nsGkAtoms::title, aDescription);
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} else if (mContent->IsXULElement()) {
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mContent->GetAttr(kNameSpaceID_None, nsGkAtoms::tooltiptext, aDescription);
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} else if (mContent->IsSVGElement()) {
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for (nsIContent* childElm = mContent->GetFirstChild(); childElm;
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childElm = childElm->GetNextSibling()) {
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if (childElm->IsSVGElement(nsGkAtoms::desc)) {
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nsTextEquivUtils::AppendTextEquivFromContent(this, childElm,
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&aDescription);
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break;
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}
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}
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}
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}
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}
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if (!aDescription.IsEmpty()) {
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aDescription.CompressWhitespace();
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nsAutoString name;
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Name(name);
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// Don't expose a description if it is the same as the name.
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if (aDescription.Equals(name))
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aDescription.Truncate();
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}
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}
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KeyBinding
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Accessible::AccessKey() const
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{
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if (!HasOwnContent())
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return KeyBinding();
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uint32_t key = nsCoreUtils::GetAccessKeyFor(mContent);
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if (!key && mContent->IsElement()) {
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Accessible* label = nullptr;
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// Copy access key from label node.
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if (mContent->IsHTMLElement()) {
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// Unless it is labeled via an ancestor <label>, in which case that would
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// be redundant.
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HTMLLabelIterator iter(Document(), this,
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HTMLLabelIterator::eSkipAncestorLabel);
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label = iter.Next();
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} else if (mContent->IsXULElement()) {
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XULLabelIterator iter(Document(), mContent);
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label = iter.Next();
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}
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if (label)
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key = nsCoreUtils::GetAccessKeyFor(label->GetContent());
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}
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if (!key)
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return KeyBinding();
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// Get modifier mask. Use ui.key.generalAccessKey (unless it is -1).
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switch (Preferences::GetInt("ui.key.generalAccessKey", -1)) {
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case -1:
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break;
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case nsIDOMKeyEvent::DOM_VK_SHIFT:
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return KeyBinding(key, KeyBinding::kShift);
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case nsIDOMKeyEvent::DOM_VK_CONTROL:
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return KeyBinding(key, KeyBinding::kControl);
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case nsIDOMKeyEvent::DOM_VK_ALT:
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return KeyBinding(key, KeyBinding::kAlt);
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case nsIDOMKeyEvent::DOM_VK_META:
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return KeyBinding(key, KeyBinding::kMeta);
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default:
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return KeyBinding();
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}
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// Determine the access modifier used in this context.
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nsIDocument* document = mContent->GetCurrentDoc();
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if (!document)
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return KeyBinding();
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nsCOMPtr<nsIDocShellTreeItem> treeItem(document->GetDocShell());
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if (!treeItem)
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return KeyBinding();
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nsresult rv = NS_ERROR_FAILURE;
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int32_t modifierMask = 0;
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switch (treeItem->ItemType()) {
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case nsIDocShellTreeItem::typeChrome:
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rv = Preferences::GetInt("ui.key.chromeAccess", &modifierMask);
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break;
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case nsIDocShellTreeItem::typeContent:
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rv = Preferences::GetInt("ui.key.contentAccess", &modifierMask);
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break;
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}
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return NS_SUCCEEDED(rv) ? KeyBinding(key, modifierMask) : KeyBinding();
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}
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KeyBinding
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Accessible::KeyboardShortcut() const
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{
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return KeyBinding();
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}
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bool
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Accessible::CanHaveAnonChildren()
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{
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return true;
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}
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void
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Accessible::TranslateString(const nsString& aKey, nsAString& aStringOut)
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{
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nsCOMPtr<nsIStringBundleService> stringBundleService =
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services::GetStringBundleService();
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if (!stringBundleService)
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return;
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nsCOMPtr<nsIStringBundle> stringBundle;
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stringBundleService->CreateBundle(
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"chrome://global-platform/locale/accessible.properties",
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getter_AddRefs(stringBundle));
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if (!stringBundle)
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return;
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nsXPIDLString xsValue;
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nsresult rv = stringBundle->GetStringFromName(aKey.get(), getter_Copies(xsValue));
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if (NS_SUCCEEDED(rv))
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aStringOut.Assign(xsValue);
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}
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uint64_t
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Accessible::VisibilityState()
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{
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nsIFrame* frame = GetFrame();
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if (!frame)
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return states::INVISIBLE;
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// Walk the parent frame chain to see if there's invisible parent or the frame
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// is in background tab.
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if (!frame->StyleVisibility()->IsVisible())
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return states::INVISIBLE;
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nsIFrame* curFrame = frame;
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do {
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nsView* view = curFrame->GetView();
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if (view && view->GetVisibility() == nsViewVisibility_kHide)
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return states::INVISIBLE;
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if (nsLayoutUtils::IsPopup(curFrame))
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return 0;
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// Offscreen state for background tab content and invisible for not selected
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// deck panel.
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nsIFrame* parentFrame = curFrame->GetParent();
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nsDeckFrame* deckFrame = do_QueryFrame(parentFrame);
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if (deckFrame && deckFrame->GetSelectedBox() != curFrame) {
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if (deckFrame->GetContent()->IsXULElement(nsGkAtoms::tabpanels))
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return states::OFFSCREEN;
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NS_NOTREACHED("Children of not selected deck panel are not accessible.");
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return states::INVISIBLE;
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}
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// If contained by scrollable frame then check that at least 12 pixels
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// around the object is visible, otherwise the object is offscreen.
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nsIScrollableFrame* scrollableFrame = do_QueryFrame(parentFrame);
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if (scrollableFrame) {
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nsRect scrollPortRect = scrollableFrame->GetScrollPortRect();
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nsRect frameRect = nsLayoutUtils::TransformFrameRectToAncestor(
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frame, frame->GetRectRelativeToSelf(), parentFrame);
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if (!scrollPortRect.Contains(frameRect)) {
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const nscoord kMinPixels = nsPresContext::CSSPixelsToAppUnits(12);
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scrollPortRect.Deflate(kMinPixels, kMinPixels);
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if (!scrollPortRect.Intersects(frameRect))
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return states::OFFSCREEN;
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}
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}
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if (!parentFrame) {
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parentFrame = nsLayoutUtils::GetCrossDocParentFrame(curFrame);
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if (parentFrame && !parentFrame->StyleVisibility()->IsVisible())
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return states::INVISIBLE;
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}
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curFrame = parentFrame;
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} while (curFrame);
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// Zero area rects can occur in the first frame of a multi-frame text flow,
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// in which case the rendered text is not empty and the frame should not be
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// marked invisible.
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// XXX Can we just remove this check? Why do we need to mark empty
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// text invisible?
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if (frame->GetType() == nsGkAtoms::textFrame &&
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!(frame->GetStateBits() & NS_FRAME_OUT_OF_FLOW) &&
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frame->GetRect().IsEmpty()) {
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nsIFrame::RenderedText text = frame->GetRenderedText(0,
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UINT32_MAX, nsIFrame::TextOffsetType::OFFSETS_IN_CONTENT_TEXT,
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nsIFrame::TrailingWhitespace::DONT_TRIM_TRAILING_WHITESPACE);
|
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if (text.mString.IsEmpty()) {
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return states::INVISIBLE;
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}
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}
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return 0;
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}
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uint64_t
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Accessible::NativeState()
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{
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uint64_t state = 0;
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if (!IsInDocument())
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state |= states::STALE;
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|
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if (HasOwnContent() && mContent->IsElement()) {
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EventStates elementState = mContent->AsElement()->State();
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if (elementState.HasState(NS_EVENT_STATE_INVALID))
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state |= states::INVALID;
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|
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if (elementState.HasState(NS_EVENT_STATE_REQUIRED))
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state |= states::REQUIRED;
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state |= NativeInteractiveState();
|
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if (FocusMgr()->IsFocused(this))
|
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state |= states::FOCUSED;
|
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}
|
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|
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// Gather states::INVISIBLE and states::OFFSCREEN flags for this object.
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state |= VisibilityState();
|
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|
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nsIFrame *frame = GetFrame();
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if (frame) {
|
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if (frame->GetStateBits() & NS_FRAME_OUT_OF_FLOW)
|
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state |= states::FLOATING;
|
||
|
||
// XXX we should look at layout for non XUL box frames, but need to decide
|
||
// how that interacts with ARIA.
|
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if (HasOwnContent() && mContent->IsXULElement() && frame->IsBoxFrame()) {
|
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const nsStyleXUL* xulStyle = frame->StyleXUL();
|
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if (xulStyle && frame->IsBoxFrame()) {
|
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// In XUL all boxes are either vertical or horizontal
|
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if (xulStyle->mBoxOrient == NS_STYLE_BOX_ORIENT_VERTICAL)
|
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state |= states::VERTICAL;
|
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else
|
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state |= states::HORIZONTAL;
|
||
}
|
||
}
|
||
}
|
||
|
||
// Check if a XUL element has the popup attribute (an attached popup menu).
|
||
if (HasOwnContent() && mContent->IsXULElement() &&
|
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mContent->HasAttr(kNameSpaceID_None, nsGkAtoms::popup))
|
||
state |= states::HASPOPUP;
|
||
|
||
// Bypass the link states specialization for non links.
|
||
if (!mRoleMapEntry || mRoleMapEntry->roleRule == kUseNativeRole ||
|
||
mRoleMapEntry->role == roles::LINK)
|
||
state |= NativeLinkState();
|
||
|
||
return state;
|
||
}
|
||
|
||
uint64_t
|
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Accessible::NativeInteractiveState() const
|
||
{
|
||
if (!mContent->IsElement())
|
||
return 0;
|
||
|
||
if (NativelyUnavailable())
|
||
return states::UNAVAILABLE;
|
||
|
||
nsIFrame* frame = GetFrame();
|
||
if (frame && frame->IsFocusable())
|
||
return states::FOCUSABLE;
|
||
|
||
return 0;
|
||
}
|
||
|
||
uint64_t
|
||
Accessible::NativeLinkState() const
|
||
{
|
||
return 0;
|
||
}
|
||
|
||
bool
|
||
Accessible::NativelyUnavailable() const
|
||
{
|
||
if (mContent->IsHTMLElement())
|
||
return mContent->AsElement()->State().HasState(NS_EVENT_STATE_DISABLED);
|
||
|
||
return mContent->AttrValueIs(kNameSpaceID_None, nsGkAtoms::disabled,
|
||
nsGkAtoms::_true, eCaseMatters);
|
||
}
|
||
|
||
Accessible*
|
||
Accessible::FocusedChild()
|
||
{
|
||
Accessible* focus = FocusMgr()->FocusedAccessible();
|
||
if (focus && (focus == this || focus->Parent() == this))
|
||
return focus;
|
||
|
||
return nullptr;
|
||
}
|
||
|
||
Accessible*
|
||
Accessible::ChildAtPoint(int32_t aX, int32_t aY,
|
||
EWhichChildAtPoint aWhichChild)
|
||
{
|
||
// If we can't find the point in a child, we will return the fallback answer:
|
||
// we return |this| if the point is within it, otherwise nullptr.
|
||
Accessible* fallbackAnswer = nullptr;
|
||
nsIntRect rect = Bounds();
|
||
if (aX >= rect.x && aX < rect.x + rect.width &&
|
||
aY >= rect.y && aY < rect.y + rect.height)
|
||
fallbackAnswer = this;
|
||
|
||
if (nsAccUtils::MustPrune(this)) // Do not dig any further
|
||
return fallbackAnswer;
|
||
|
||
// Search an accessible at the given point starting from accessible document
|
||
// because containing block (see CSS2) for out of flow element (for example,
|
||
// absolutely positioned element) may be different from its DOM parent and
|
||
// therefore accessible for containing block may be different from accessible
|
||
// for DOM parent but GetFrameForPoint() should be called for containing block
|
||
// to get an out of flow element.
|
||
DocAccessible* accDocument = Document();
|
||
NS_ENSURE_TRUE(accDocument, nullptr);
|
||
|
||
nsIFrame* rootFrame = accDocument->GetFrame();
|
||
NS_ENSURE_TRUE(rootFrame, nullptr);
|
||
|
||
nsIFrame* startFrame = rootFrame;
|
||
|
||
// Check whether the point is at popup content.
|
||
nsIWidget* rootWidget = rootFrame->GetView()->GetNearestWidget(nullptr);
|
||
NS_ENSURE_TRUE(rootWidget, nullptr);
|
||
|
||
LayoutDeviceIntRect rootRect;
|
||
rootWidget->GetScreenBounds(rootRect);
|
||
|
||
WidgetMouseEvent dummyEvent(true, eMouseMove, rootWidget,
|
||
WidgetMouseEvent::eSynthesized);
|
||
dummyEvent.refPoint = LayoutDeviceIntPoint(aX - rootRect.x, aY - rootRect.y);
|
||
|
||
nsIFrame* popupFrame = nsLayoutUtils::
|
||
GetPopupFrameForEventCoordinates(accDocument->PresContext()->GetRootPresContext(),
|
||
&dummyEvent);
|
||
if (popupFrame) {
|
||
// If 'this' accessible is not inside the popup then ignore the popup when
|
||
// searching an accessible at point.
|
||
DocAccessible* popupDoc =
|
||
GetAccService()->GetDocAccessible(popupFrame->GetContent()->OwnerDoc());
|
||
Accessible* popupAcc =
|
||
popupDoc->GetAccessibleOrContainer(popupFrame->GetContent());
|
||
Accessible* popupChild = this;
|
||
while (popupChild && !popupChild->IsDoc() && popupChild != popupAcc)
|
||
popupChild = popupChild->Parent();
|
||
|
||
if (popupChild == popupAcc)
|
||
startFrame = popupFrame;
|
||
}
|
||
|
||
nsPresContext* presContext = startFrame->PresContext();
|
||
nsRect screenRect = startFrame->GetScreenRectInAppUnits();
|
||
nsPoint offset(presContext->DevPixelsToAppUnits(aX) - screenRect.x,
|
||
presContext->DevPixelsToAppUnits(aY) - screenRect.y);
|
||
nsIFrame* foundFrame = nsLayoutUtils::GetFrameForPoint(startFrame, offset);
|
||
|
||
nsIContent* content = nullptr;
|
||
if (!foundFrame || !(content = foundFrame->GetContent()))
|
||
return fallbackAnswer;
|
||
|
||
// Get accessible for the node with the point or the first accessible in
|
||
// the DOM parent chain.
|
||
DocAccessible* contentDocAcc = GetAccService()->
|
||
GetDocAccessible(content->OwnerDoc());
|
||
|
||
// contentDocAcc in some circumstances can be nullptr. See bug 729861
|
||
NS_ASSERTION(contentDocAcc, "could not get the document accessible");
|
||
if (!contentDocAcc)
|
||
return fallbackAnswer;
|
||
|
||
Accessible* accessible = contentDocAcc->GetAccessibleOrContainer(content);
|
||
if (!accessible)
|
||
return fallbackAnswer;
|
||
|
||
// Hurray! We have an accessible for the frame that layout gave us.
|
||
// Since DOM node of obtained accessible may be out of flow then we should
|
||
// ensure obtained accessible is a child of this accessible.
|
||
Accessible* child = accessible;
|
||
while (child != this) {
|
||
Accessible* parent = child->Parent();
|
||
if (!parent) {
|
||
// Reached the top of the hierarchy. These bounds were inside an
|
||
// accessible that is not a descendant of this one.
|
||
return fallbackAnswer;
|
||
}
|
||
|
||
// If we landed on a legitimate child of |this|, and we want the direct
|
||
// child, return it here.
|
||
if (parent == this && aWhichChild == eDirectChild)
|
||
return child;
|
||
|
||
child = parent;
|
||
}
|
||
|
||
// Manually walk through accessible children and see if the are within this
|
||
// point. Skip offscreen or invisible accessibles. This takes care of cases
|
||
// where layout won't walk into things for us, such as image map areas and
|
||
// sub documents (XXX: subdocuments should be handled by methods of
|
||
// OuterDocAccessibles).
|
||
uint32_t childCount = accessible->ChildCount();
|
||
for (uint32_t childIdx = 0; childIdx < childCount; childIdx++) {
|
||
Accessible* child = accessible->GetChildAt(childIdx);
|
||
|
||
nsIntRect childRect = child->Bounds();
|
||
if (aX >= childRect.x && aX < childRect.x + childRect.width &&
|
||
aY >= childRect.y && aY < childRect.y + childRect.height &&
|
||
(child->State() & states::INVISIBLE) == 0) {
|
||
|
||
if (aWhichChild == eDeepestChild)
|
||
return child->ChildAtPoint(aX, aY, eDeepestChild);
|
||
|
||
return child;
|
||
}
|
||
}
|
||
|
||
return accessible;
|
||
}
|
||
|
||
nsRect
|
||
Accessible::RelativeBounds(nsIFrame** aBoundingFrame) const
|
||
{
|
||
nsIFrame* frame = GetFrame();
|
||
if (frame && mContent) {
|
||
bool* hasHitRegionRect = static_cast<bool*>(mContent->GetProperty(nsGkAtoms::hitregion));
|
||
|
||
if (hasHitRegionRect && mContent->IsElement()) {
|
||
// This is for canvas fallback content
|
||
// Find a canvas frame the found hit region is relative to.
|
||
nsIFrame* canvasFrame = frame->GetParent();
|
||
if (canvasFrame) {
|
||
canvasFrame = nsLayoutUtils::GetClosestFrameOfType(canvasFrame, nsGkAtoms::HTMLCanvasFrame);
|
||
}
|
||
|
||
// make the canvas the bounding frame
|
||
if (canvasFrame) {
|
||
*aBoundingFrame = canvasFrame;
|
||
dom::HTMLCanvasElement *canvas =
|
||
dom::HTMLCanvasElement::FromContent(canvasFrame->GetContent());
|
||
|
||
// get the bounding rect of the hit region
|
||
nsRect bounds;
|
||
if (canvas && canvas->CountContexts() &&
|
||
canvas->GetContextAtIndex(0)->GetHitRegionRect(mContent->AsElement(), bounds)) {
|
||
return bounds;
|
||
}
|
||
}
|
||
}
|
||
|
||
*aBoundingFrame = nsLayoutUtils::GetContainingBlockForClientRect(frame);
|
||
return nsLayoutUtils::
|
||
GetAllInFlowRectsUnion(frame, *aBoundingFrame,
|
||
nsLayoutUtils::RECTS_ACCOUNT_FOR_TRANSFORMS);
|
||
}
|
||
|
||
return nsRect();
|
||
}
|
||
|
||
nsIntRect
|
||
Accessible::Bounds() const
|
||
{
|
||
nsIFrame* boundingFrame = nullptr;
|
||
nsRect unionRectTwips = RelativeBounds(&boundingFrame);
|
||
if (!boundingFrame)
|
||
return nsIntRect();
|
||
|
||
nsIntRect screenRect;
|
||
nsPresContext* presContext = mDoc->PresContext();
|
||
screenRect.x = presContext->AppUnitsToDevPixels(unionRectTwips.x);
|
||
screenRect.y = presContext->AppUnitsToDevPixels(unionRectTwips.y);
|
||
screenRect.width = presContext->AppUnitsToDevPixels(unionRectTwips.width);
|
||
screenRect.height = presContext->AppUnitsToDevPixels(unionRectTwips.height);
|
||
|
||
// We have the union of the rectangle, now we need to put it in absolute
|
||
// screen coords.
|
||
nsIntRect orgRectPixels = boundingFrame->GetScreenRectInAppUnits().
|
||
ToNearestPixels(presContext->AppUnitsPerDevPixel());
|
||
screenRect.x += orgRectPixels.x;
|
||
screenRect.y += orgRectPixels.y;
|
||
|
||
return screenRect;
|
||
}
|
||
|
||
void
|
||
Accessible::SetSelected(bool aSelect)
|
||
{
|
||
if (!HasOwnContent())
|
||
return;
|
||
|
||
Accessible* select = nsAccUtils::GetSelectableContainer(this, State());
|
||
if (select) {
|
||
if (select->State() & states::MULTISELECTABLE) {
|
||
if (mRoleMapEntry) {
|
||
if (aSelect) {
|
||
mContent->SetAttr(kNameSpaceID_None, nsGkAtoms::aria_selected,
|
||
NS_LITERAL_STRING("true"), true);
|
||
} else {
|
||
mContent->UnsetAttr(kNameSpaceID_None, nsGkAtoms::aria_selected, true);
|
||
}
|
||
}
|
||
return;
|
||
}
|
||
|
||
if (aSelect)
|
||
TakeFocus();
|
||
}
|
||
}
|
||
|
||
void
|
||
Accessible::TakeSelection()
|
||
{
|
||
Accessible* select = nsAccUtils::GetSelectableContainer(this, State());
|
||
if (select) {
|
||
if (select->State() & states::MULTISELECTABLE)
|
||
select->UnselectAll();
|
||
SetSelected(true);
|
||
}
|
||
}
|
||
|
||
void
|
||
Accessible::TakeFocus()
|
||
{
|
||
nsIFrame* frame = GetFrame();
|
||
if (!frame)
|
||
return;
|
||
|
||
nsIContent* focusContent = mContent;
|
||
|
||
// If the accessible focus is managed by container widget then focus the
|
||
// widget and set the accessible as its current item.
|
||
if (!frame->IsFocusable()) {
|
||
Accessible* widget = ContainerWidget();
|
||
if (widget && widget->AreItemsOperable()) {
|
||
nsIContent* widgetElm = widget->GetContent();
|
||
nsIFrame* widgetFrame = widgetElm->GetPrimaryFrame();
|
||
if (widgetFrame && widgetFrame->IsFocusable()) {
|
||
focusContent = widgetElm;
|
||
widget->SetCurrentItem(this);
|
||
}
|
||
}
|
||
}
|
||
|
||
nsCOMPtr<nsIDOMElement> element(do_QueryInterface(focusContent));
|
||
nsFocusManager* fm = nsFocusManager::GetFocusManager();
|
||
if (fm)
|
||
fm->SetFocus(element, 0);
|
||
}
|
||
|
||
void
|
||
Accessible::XULElmName(DocAccessible* aDocument,
|
||
nsIContent* aElm, nsString& aName)
|
||
{
|
||
/**
|
||
* 3 main cases for XUL Controls to be labeled
|
||
* 1 - control contains label="foo"
|
||
* 2 - control has, as a child, a label element
|
||
* - label has either value="foo" or children
|
||
* 3 - non-child label contains control="controlID"
|
||
* - label has either value="foo" or children
|
||
* Once a label is found, the search is discontinued, so a control
|
||
* that has a label child as well as having a label external to
|
||
* the control that uses the control="controlID" syntax will use
|
||
* the child label for its Name.
|
||
*/
|
||
|
||
// CASE #1 (via label attribute) -- great majority of the cases
|
||
nsCOMPtr<nsIDOMXULLabeledControlElement> labeledEl = do_QueryInterface(aElm);
|
||
if (labeledEl) {
|
||
labeledEl->GetLabel(aName);
|
||
} else {
|
||
nsCOMPtr<nsIDOMXULSelectControlItemElement> itemEl = do_QueryInterface(aElm);
|
||
if (itemEl) {
|
||
itemEl->GetLabel(aName);
|
||
} else {
|
||
nsCOMPtr<nsIDOMXULSelectControlElement> select = do_QueryInterface(aElm);
|
||
// Use label if this is not a select control element which
|
||
// uses label attribute to indicate which option is selected
|
||
if (!select) {
|
||
nsCOMPtr<nsIDOMXULElement> xulEl(do_QueryInterface(aElm));
|
||
if (xulEl)
|
||
xulEl->GetAttribute(NS_LITERAL_STRING("label"), aName);
|
||
}
|
||
}
|
||
}
|
||
|
||
// CASES #2 and #3 ------ label as a child or <label control="id" ... > </label>
|
||
if (aName.IsEmpty()) {
|
||
Accessible* labelAcc = nullptr;
|
||
XULLabelIterator iter(aDocument, aElm);
|
||
while ((labelAcc = iter.Next())) {
|
||
nsCOMPtr<nsIDOMXULLabelElement> xulLabel =
|
||
do_QueryInterface(labelAcc->GetContent());
|
||
// Check if label's value attribute is used
|
||
if (xulLabel && NS_SUCCEEDED(xulLabel->GetValue(aName)) && aName.IsEmpty()) {
|
||
// If no value attribute, a non-empty label must contain
|
||
// children that define its text -- possibly using HTML
|
||
nsTextEquivUtils::
|
||
AppendTextEquivFromContent(labelAcc, labelAcc->GetContent(), &aName);
|
||
}
|
||
}
|
||
}
|
||
|
||
aName.CompressWhitespace();
|
||
if (!aName.IsEmpty())
|
||
return;
|
||
|
||
// Can get text from title of <toolbaritem> if we're a child of a <toolbaritem>
|
||
nsIContent *bindingParent = aElm->GetBindingParent();
|
||
nsIContent* parent =
|
||
bindingParent? bindingParent->GetParent() : aElm->GetParent();
|
||
while (parent) {
|
||
if (parent->IsXULElement(nsGkAtoms::toolbaritem) &&
|
||
parent->GetAttr(kNameSpaceID_None, nsGkAtoms::title, aName)) {
|
||
aName.CompressWhitespace();
|
||
return;
|
||
}
|
||
parent = parent->GetParent();
|
||
}
|
||
}
|
||
|
||
nsresult
|
||
Accessible::HandleAccEvent(AccEvent* aEvent)
|
||
{
|
||
NS_ENSURE_ARG_POINTER(aEvent);
|
||
|
||
if (IPCAccessibilityActive() && Document()) {
|
||
DocAccessibleChild* ipcDoc = mDoc->IPCDoc();
|
||
MOZ_ASSERT(ipcDoc);
|
||
if (ipcDoc) {
|
||
uint64_t id = aEvent->GetAccessible()->IsDoc() ? 0 :
|
||
reinterpret_cast<uintptr_t>(aEvent->GetAccessible());
|
||
|
||
switch(aEvent->GetEventType()) {
|
||
case nsIAccessibleEvent::EVENT_SHOW:
|
||
ipcDoc->ShowEvent(downcast_accEvent(aEvent));
|
||
break;
|
||
|
||
case nsIAccessibleEvent::EVENT_HIDE:
|
||
ipcDoc->SendHideEvent(id);
|
||
break;
|
||
|
||
case nsIAccessibleEvent::EVENT_REORDER:
|
||
// reorder events on the application acc aren't necessary to tell the parent
|
||
// about new top level documents.
|
||
if (!aEvent->GetAccessible()->IsApplication())
|
||
ipcDoc->SendEvent(id, aEvent->GetEventType());
|
||
break;
|
||
case nsIAccessibleEvent::EVENT_STATE_CHANGE: {
|
||
AccStateChangeEvent* event = downcast_accEvent(aEvent);
|
||
ipcDoc->SendStateChangeEvent(id, event->GetState(),
|
||
event->IsStateEnabled());
|
||
break;
|
||
}
|
||
case nsIAccessibleEvent::EVENT_TEXT_CARET_MOVED: {
|
||
AccCaretMoveEvent* event = downcast_accEvent(aEvent);
|
||
ipcDoc->SendCaretMoveEvent(id, event->GetCaretOffset());
|
||
break;
|
||
}
|
||
case nsIAccessibleEvent::EVENT_TEXT_INSERTED:
|
||
case nsIAccessibleEvent::EVENT_TEXT_REMOVED: {
|
||
AccTextChangeEvent* event = downcast_accEvent(aEvent);
|
||
ipcDoc->SendTextChangeEvent(id, event->ModifiedText(),
|
||
event->GetStartOffset(),
|
||
event->GetLength(),
|
||
event->IsTextInserted(),
|
||
event->IsFromUserInput());
|
||
break;
|
||
}
|
||
default:
|
||
ipcDoc->SendEvent(id, aEvent->GetEventType());
|
||
}
|
||
}
|
||
}
|
||
|
||
nsCOMPtr<nsIObserverService> obsService = services::GetObserverService();
|
||
NS_ENSURE_TRUE(obsService, NS_ERROR_FAILURE);
|
||
|
||
nsCOMPtr<nsISimpleEnumerator> observers;
|
||
obsService->EnumerateObservers(NS_ACCESSIBLE_EVENT_TOPIC,
|
||
getter_AddRefs(observers));
|
||
|
||
NS_ENSURE_STATE(observers);
|
||
|
||
bool hasObservers = false;
|
||
observers->HasMoreElements(&hasObservers);
|
||
if (hasObservers) {
|
||
nsCOMPtr<nsIAccessibleEvent> event = MakeXPCEvent(aEvent);
|
||
return obsService->NotifyObservers(event, NS_ACCESSIBLE_EVENT_TOPIC, nullptr);
|
||
}
|
||
|
||
return NS_OK;
|
||
}
|
||
|
||
already_AddRefed<nsIPersistentProperties>
|
||
Accessible::Attributes()
|
||
{
|
||
nsCOMPtr<nsIPersistentProperties> attributes = NativeAttributes();
|
||
if (!HasOwnContent() || !mContent->IsElement())
|
||
return attributes.forget();
|
||
|
||
// 'xml-roles' attribute for landmark.
|
||
nsIAtom* landmark = LandmarkRole();
|
||
if (landmark) {
|
||
nsAccUtils::SetAccAttr(attributes, nsGkAtoms::xmlroles, landmark);
|
||
|
||
} else {
|
||
// 'xml-roles' attribute coming from ARIA.
|
||
nsAutoString xmlRoles;
|
||
if (mContent->GetAttr(kNameSpaceID_None, nsGkAtoms::role, xmlRoles))
|
||
nsAccUtils::SetAccAttr(attributes, nsGkAtoms::xmlroles, xmlRoles);
|
||
}
|
||
|
||
// Expose object attributes from ARIA attributes.
|
||
nsAutoString unused;
|
||
aria::AttrIterator attribIter(mContent);
|
||
nsAutoString name, value;
|
||
while(attribIter.Next(name, value))
|
||
attributes->SetStringProperty(NS_ConvertUTF16toUTF8(name), value, unused);
|
||
|
||
if (IsARIAHidden()) {
|
||
nsAccUtils::SetAccAttr(attributes, nsGkAtoms::hidden,
|
||
NS_LITERAL_STRING("true"));
|
||
}
|
||
|
||
// If there is no aria-live attribute then expose default value of 'live'
|
||
// object attribute used for ARIA role of this accessible.
|
||
if (mRoleMapEntry) {
|
||
if (mRoleMapEntry->Is(nsGkAtoms::searchbox)) {
|
||
nsAccUtils::SetAccAttr(attributes, nsGkAtoms::textInputType,
|
||
NS_LITERAL_STRING("search"));
|
||
}
|
||
|
||
nsAutoString live;
|
||
nsAccUtils::GetAccAttr(attributes, nsGkAtoms::live, live);
|
||
if (live.IsEmpty()) {
|
||
if (nsAccUtils::GetLiveAttrValue(mRoleMapEntry->liveAttRule, live))
|
||
nsAccUtils::SetAccAttr(attributes, nsGkAtoms::live, live);
|
||
}
|
||
}
|
||
|
||
return attributes.forget();
|
||
}
|
||
|
||
already_AddRefed<nsIPersistentProperties>
|
||
Accessible::NativeAttributes()
|
||
{
|
||
nsCOMPtr<nsIPersistentProperties> attributes =
|
||
do_CreateInstance(NS_PERSISTENTPROPERTIES_CONTRACTID);
|
||
|
||
nsAutoString unused;
|
||
|
||
// We support values, so expose the string value as well, via the valuetext
|
||
// object attribute. We test for the value interface because we don't want
|
||
// to expose traditional Value() information such as URL's on links and
|
||
// documents, or text in an input.
|
||
if (HasNumericValue()) {
|
||
nsAutoString valuetext;
|
||
Value(valuetext);
|
||
attributes->SetStringProperty(NS_LITERAL_CSTRING("valuetext"), valuetext,
|
||
unused);
|
||
}
|
||
|
||
// Expose checkable object attribute if the accessible has checkable state
|
||
if (State() & states::CHECKABLE) {
|
||
nsAccUtils::SetAccAttr(attributes, nsGkAtoms::checkable,
|
||
NS_LITERAL_STRING("true"));
|
||
}
|
||
|
||
// Expose 'explicit-name' attribute.
|
||
nsAutoString name;
|
||
if (Name(name) != eNameFromSubtree && !name.IsVoid()) {
|
||
attributes->SetStringProperty(NS_LITERAL_CSTRING("explicit-name"),
|
||
NS_LITERAL_STRING("true"), unused);
|
||
}
|
||
|
||
// Group attributes (level/setsize/posinset)
|
||
GroupPos groupPos = GroupPosition();
|
||
nsAccUtils::SetAccGroupAttrs(attributes, groupPos.level,
|
||
groupPos.setSize, groupPos.posInSet);
|
||
|
||
// If the accessible doesn't have own content (such as list item bullet or
|
||
// xul tree item) then don't calculate content based attributes.
|
||
if (!HasOwnContent())
|
||
return attributes.forget();
|
||
|
||
nsEventShell::GetEventAttributes(GetNode(), attributes);
|
||
|
||
// Get container-foo computed live region properties based on the closest
|
||
// container with the live region attribute. Inner nodes override outer nodes
|
||
// within the same document. The inner nodes can be used to override live
|
||
// region behavior on more general outer nodes. However, nodes in outer
|
||
// documents override nodes in inner documents: outer doc author may want to
|
||
// override properties on a widget they used in an iframe.
|
||
nsIContent* startContent = mContent;
|
||
while (startContent) {
|
||
nsIDocument* doc = startContent->GetComposedDoc();
|
||
if (!doc)
|
||
break;
|
||
|
||
nsAccUtils::SetLiveContainerAttributes(attributes, startContent,
|
||
nsCoreUtils::GetRoleContent(doc));
|
||
|
||
// Allow ARIA live region markup from outer documents to override
|
||
nsCOMPtr<nsIDocShellTreeItem> docShellTreeItem = doc->GetDocShell();
|
||
if (!docShellTreeItem)
|
||
break;
|
||
|
||
nsCOMPtr<nsIDocShellTreeItem> sameTypeParent;
|
||
docShellTreeItem->GetSameTypeParent(getter_AddRefs(sameTypeParent));
|
||
if (!sameTypeParent || sameTypeParent == docShellTreeItem)
|
||
break;
|
||
|
||
nsIDocument* parentDoc = doc->GetParentDocument();
|
||
if (!parentDoc)
|
||
break;
|
||
|
||
startContent = parentDoc->FindContentForSubDocument(doc);
|
||
}
|
||
|
||
if (!mContent->IsElement())
|
||
return attributes.forget();
|
||
|
||
nsAutoString id;
|
||
if (nsCoreUtils::GetID(mContent, id))
|
||
attributes->SetStringProperty(NS_LITERAL_CSTRING("id"), id, unused);
|
||
|
||
// Expose class because it may have useful microformat information.
|
||
nsAutoString _class;
|
||
if (mContent->GetAttr(kNameSpaceID_None, nsGkAtoms::_class, _class))
|
||
nsAccUtils::SetAccAttr(attributes, nsGkAtoms::_class, _class);
|
||
|
||
// Expose tag.
|
||
nsAutoString tagName;
|
||
mContent->NodeInfo()->GetName(tagName);
|
||
nsAccUtils::SetAccAttr(attributes, nsGkAtoms::tag, tagName);
|
||
|
||
// Expose draggable object attribute.
|
||
nsCOMPtr<nsIDOMHTMLElement> htmlElement = do_QueryInterface(mContent);
|
||
if (htmlElement) {
|
||
bool draggable = false;
|
||
htmlElement->GetDraggable(&draggable);
|
||
if (draggable) {
|
||
nsAccUtils::SetAccAttr(attributes, nsGkAtoms::draggable,
|
||
NS_LITERAL_STRING("true"));
|
||
}
|
||
}
|
||
|
||
// Don't calculate CSS-based object attributes when no frame (i.e.
|
||
// the accessible is unattached from the tree).
|
||
if (!mContent->GetPrimaryFrame())
|
||
return attributes.forget();
|
||
|
||
// CSS style based object attributes.
|
||
nsAutoString value;
|
||
StyleInfo styleInfo(mContent->AsElement(), mDoc->PresShell());
|
||
|
||
// Expose 'display' attribute.
|
||
styleInfo.Display(value);
|
||
nsAccUtils::SetAccAttr(attributes, nsGkAtoms::display, value);
|
||
|
||
// Expose 'text-align' attribute.
|
||
styleInfo.TextAlign(value);
|
||
nsAccUtils::SetAccAttr(attributes, nsGkAtoms::textAlign, value);
|
||
|
||
// Expose 'text-indent' attribute.
|
||
styleInfo.TextIndent(value);
|
||
nsAccUtils::SetAccAttr(attributes, nsGkAtoms::textIndent, value);
|
||
|
||
// Expose 'margin-left' attribute.
|
||
styleInfo.MarginLeft(value);
|
||
nsAccUtils::SetAccAttr(attributes, nsGkAtoms::marginLeft, value);
|
||
|
||
// Expose 'margin-right' attribute.
|
||
styleInfo.MarginRight(value);
|
||
nsAccUtils::SetAccAttr(attributes, nsGkAtoms::marginRight, value);
|
||
|
||
// Expose 'margin-top' attribute.
|
||
styleInfo.MarginTop(value);
|
||
nsAccUtils::SetAccAttr(attributes, nsGkAtoms::marginTop, value);
|
||
|
||
// Expose 'margin-bottom' attribute.
|
||
styleInfo.MarginBottom(value);
|
||
nsAccUtils::SetAccAttr(attributes, nsGkAtoms::marginBottom, value);
|
||
|
||
return attributes.forget();
|
||
}
|
||
|
||
GroupPos
|
||
Accessible::GroupPosition()
|
||
{
|
||
GroupPos groupPos;
|
||
if (!HasOwnContent())
|
||
return groupPos;
|
||
|
||
// Get group position from ARIA attributes.
|
||
nsCoreUtils::GetUIntAttr(mContent, nsGkAtoms::aria_level, &groupPos.level);
|
||
nsCoreUtils::GetUIntAttr(mContent, nsGkAtoms::aria_setsize, &groupPos.setSize);
|
||
nsCoreUtils::GetUIntAttr(mContent, nsGkAtoms::aria_posinset, &groupPos.posInSet);
|
||
|
||
// If ARIA is missed and the accessible is visible then calculate group
|
||
// position from hierarchy.
|
||
if (State() & states::INVISIBLE)
|
||
return groupPos;
|
||
|
||
// Calculate group level if ARIA is missed.
|
||
if (groupPos.level == 0) {
|
||
int32_t level = GetLevelInternal();
|
||
if (level != 0)
|
||
groupPos.level = level;
|
||
}
|
||
|
||
// Calculate position in group and group size if ARIA is missed.
|
||
if (groupPos.posInSet == 0 || groupPos.setSize == 0) {
|
||
int32_t posInSet = 0, setSize = 0;
|
||
GetPositionAndSizeInternal(&posInSet, &setSize);
|
||
if (posInSet != 0 && setSize != 0) {
|
||
if (groupPos.posInSet == 0)
|
||
groupPos.posInSet = posInSet;
|
||
|
||
if (groupPos.setSize == 0)
|
||
groupPos.setSize = setSize;
|
||
}
|
||
}
|
||
|
||
return groupPos;
|
||
}
|
||
|
||
uint64_t
|
||
Accessible::State()
|
||
{
|
||
if (IsDefunct())
|
||
return states::DEFUNCT;
|
||
|
||
uint64_t state = NativeState();
|
||
// Apply ARIA states to be sure accessible states will be overridden.
|
||
ApplyARIAState(&state);
|
||
|
||
// If this is an ARIA item of the selectable widget and if it's focused and
|
||
// not marked unselected explicitly (i.e. aria-selected="false") then expose
|
||
// it as selected to make ARIA widget authors life easier.
|
||
if (mRoleMapEntry && !(state & states::SELECTED) &&
|
||
!mContent->AttrValueIs(kNameSpaceID_None,
|
||
nsGkAtoms::aria_selected,
|
||
nsGkAtoms::_false, eCaseMatters)) {
|
||
// Special case for tabs: focused tab or focus inside related tab panel
|
||
// implies selected state.
|
||
if (mRoleMapEntry->role == roles::PAGETAB) {
|
||
if (state & states::FOCUSED) {
|
||
state |= states::SELECTED;
|
||
} else {
|
||
// If focus is in a child of the tab panel surely the tab is selected!
|
||
Relation rel = RelationByType(RelationType::LABEL_FOR);
|
||
Accessible* relTarget = nullptr;
|
||
while ((relTarget = rel.Next())) {
|
||
if (relTarget->Role() == roles::PROPERTYPAGE &&
|
||
FocusMgr()->IsFocusWithin(relTarget))
|
||
state |= states::SELECTED;
|
||
}
|
||
}
|
||
} else if (state & states::FOCUSED) {
|
||
Accessible* container = nsAccUtils::GetSelectableContainer(this, state);
|
||
if (container &&
|
||
!nsAccUtils::HasDefinedARIAToken(container->GetContent(),
|
||
nsGkAtoms::aria_multiselectable)) {
|
||
state |= states::SELECTED;
|
||
}
|
||
}
|
||
}
|
||
|
||
const uint32_t kExpandCollapseStates = states::COLLAPSED | states::EXPANDED;
|
||
if ((state & kExpandCollapseStates) == kExpandCollapseStates) {
|
||
// Cannot be both expanded and collapsed -- this happens in ARIA expanded
|
||
// combobox because of limitation of ARIAMap.
|
||
// XXX: Perhaps we will be able to make this less hacky if we support
|
||
// extended states in ARIAMap, e.g. derive COLLAPSED from
|
||
// EXPANDABLE && !EXPANDED.
|
||
state &= ~states::COLLAPSED;
|
||
}
|
||
|
||
if (!(state & states::UNAVAILABLE)) {
|
||
state |= states::ENABLED | states::SENSITIVE;
|
||
|
||
// If the object is a current item of container widget then mark it as
|
||
// ACTIVE. This allows screen reader virtual buffer modes to know which
|
||
// descendant is the current one that would get focus if the user navigates
|
||
// to the container widget.
|
||
Accessible* widget = ContainerWidget();
|
||
if (widget && widget->CurrentItem() == this)
|
||
state |= states::ACTIVE;
|
||
}
|
||
|
||
if ((state & states::COLLAPSED) || (state & states::EXPANDED))
|
||
state |= states::EXPANDABLE;
|
||
|
||
// For some reasons DOM node may have not a frame. We tract such accessibles
|
||
// as invisible.
|
||
nsIFrame *frame = GetFrame();
|
||
if (!frame)
|
||
return state;
|
||
|
||
const nsStyleDisplay* display = frame->StyleDisplay();
|
||
if (display && display->mOpacity == 1.0f &&
|
||
!(state & states::INVISIBLE)) {
|
||
state |= states::OPAQUE1;
|
||
}
|
||
|
||
return state;
|
||
}
|
||
|
||
void
|
||
Accessible::ApplyARIAState(uint64_t* aState) const
|
||
{
|
||
if (!mContent->IsElement())
|
||
return;
|
||
|
||
dom::Element* element = mContent->AsElement();
|
||
|
||
// Test for universal states first
|
||
*aState |= aria::UniversalStatesFor(element);
|
||
|
||
if (mRoleMapEntry) {
|
||
|
||
// We only force the readonly bit off if we have a real mapping for the aria
|
||
// role. This preserves the ability for screen readers to use readonly
|
||
// (primarily on the document) as the hint for creating a virtual buffer.
|
||
if (mRoleMapEntry->role != roles::NOTHING)
|
||
*aState &= ~states::READONLY;
|
||
|
||
if (mContent->HasID()) {
|
||
// If has a role & ID and aria-activedescendant on the container, assume
|
||
// focusable.
|
||
const Accessible* ancestor = this;
|
||
while ((ancestor = ancestor->Parent()) && !ancestor->IsDoc()) {
|
||
dom::Element* el = ancestor->Elm();
|
||
if (el &&
|
||
el->HasAttr(kNameSpaceID_None, nsGkAtoms::aria_activedescendant)) {
|
||
*aState |= states::FOCUSABLE;
|
||
break;
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
if (*aState & states::FOCUSABLE) {
|
||
// Propogate aria-disabled from ancestors down to any focusable descendant.
|
||
const Accessible* ancestor = this;
|
||
while ((ancestor = ancestor->Parent()) && !ancestor->IsDoc()) {
|
||
dom::Element* el = ancestor->Elm();
|
||
if (el && el->AttrValueIs(kNameSpaceID_None, nsGkAtoms::aria_disabled,
|
||
nsGkAtoms::_true, eCaseMatters)) {
|
||
*aState |= states::UNAVAILABLE;
|
||
break;
|
||
}
|
||
}
|
||
}
|
||
|
||
// special case: A native button element whose role got transformed by ARIA to a toggle button
|
||
// Also applies to togglable button menus, like in the Dev Tools Web Console.
|
||
if (IsButton() || IsMenuButton())
|
||
aria::MapToState(aria::eARIAPressed, element, aState);
|
||
|
||
if (!mRoleMapEntry)
|
||
return;
|
||
|
||
*aState |= mRoleMapEntry->state;
|
||
|
||
if (aria::MapToState(mRoleMapEntry->attributeMap1, element, aState) &&
|
||
aria::MapToState(mRoleMapEntry->attributeMap2, element, aState) &&
|
||
aria::MapToState(mRoleMapEntry->attributeMap3, element, aState))
|
||
aria::MapToState(mRoleMapEntry->attributeMap4, element, aState);
|
||
|
||
// ARIA gridcell inherits editable/readonly states from the grid until it's
|
||
// overridden.
|
||
if ((mRoleMapEntry->Is(nsGkAtoms::gridcell) ||
|
||
mRoleMapEntry->Is(nsGkAtoms::columnheader) ||
|
||
mRoleMapEntry->Is(nsGkAtoms::rowheader)) &&
|
||
!(*aState & (states::READONLY | states::EDITABLE))) {
|
||
const TableCellAccessible* cell = AsTableCell();
|
||
if (cell) {
|
||
TableAccessible* table = cell->Table();
|
||
if (table) {
|
||
Accessible* grid = table->AsAccessible();
|
||
uint64_t gridState = 0;
|
||
grid->ApplyARIAState(&gridState);
|
||
*aState |= (gridState & (states::READONLY | states::EDITABLE));
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
void
|
||
Accessible::Value(nsString& aValue)
|
||
{
|
||
if (!mRoleMapEntry)
|
||
return;
|
||
|
||
if (mRoleMapEntry->valueRule != eNoValue) {
|
||
// aria-valuenow is a number, and aria-valuetext is the optional text
|
||
// equivalent. For the string value, we will try the optional text
|
||
// equivalent first.
|
||
if (!mContent->GetAttr(kNameSpaceID_None,
|
||
nsGkAtoms::aria_valuetext, aValue)) {
|
||
mContent->GetAttr(kNameSpaceID_None, nsGkAtoms::aria_valuenow,
|
||
aValue);
|
||
}
|
||
return;
|
||
}
|
||
|
||
// Value of textbox is a textified subtree.
|
||
if (mRoleMapEntry->Is(nsGkAtoms::textbox)) {
|
||
nsTextEquivUtils::GetTextEquivFromSubtree(this, aValue);
|
||
return;
|
||
}
|
||
|
||
// Value of combobox is a text of current or selected item.
|
||
if (mRoleMapEntry->Is(nsGkAtoms::combobox)) {
|
||
Accessible* option = CurrentItem();
|
||
if (!option) {
|
||
uint32_t childCount = ChildCount();
|
||
for (uint32_t idx = 0; idx < childCount; idx++) {
|
||
Accessible* child = mChildren.ElementAt(idx);
|
||
if (child->IsListControl()) {
|
||
option = child->GetSelectedItem(0);
|
||
break;
|
||
}
|
||
}
|
||
}
|
||
|
||
if (option)
|
||
nsTextEquivUtils::GetTextEquivFromSubtree(option, aValue);
|
||
}
|
||
}
|
||
|
||
double
|
||
Accessible::MaxValue() const
|
||
{
|
||
return AttrNumericValue(nsGkAtoms::aria_valuemax);
|
||
}
|
||
|
||
double
|
||
Accessible::MinValue() const
|
||
{
|
||
return AttrNumericValue(nsGkAtoms::aria_valuemin);
|
||
}
|
||
|
||
double
|
||
Accessible::Step() const
|
||
{
|
||
return UnspecifiedNaN<double>(); // no mimimum increment (step) in ARIA.
|
||
}
|
||
|
||
double
|
||
Accessible::CurValue() const
|
||
{
|
||
return AttrNumericValue(nsGkAtoms::aria_valuenow);
|
||
}
|
||
|
||
bool
|
||
Accessible::SetCurValue(double aValue)
|
||
{
|
||
if (!mRoleMapEntry || mRoleMapEntry->valueRule == eNoValue)
|
||
return false;
|
||
|
||
const uint32_t kValueCannotChange = states::READONLY | states::UNAVAILABLE;
|
||
if (State() & kValueCannotChange)
|
||
return false;
|
||
|
||
double checkValue = MinValue();
|
||
if (!IsNaN(checkValue) && aValue < checkValue)
|
||
return false;
|
||
|
||
checkValue = MaxValue();
|
||
if (!IsNaN(checkValue) && aValue > checkValue)
|
||
return false;
|
||
|
||
nsAutoString strValue;
|
||
strValue.AppendFloat(aValue);
|
||
|
||
return NS_SUCCEEDED(
|
||
mContent->SetAttr(kNameSpaceID_None, nsGkAtoms::aria_valuenow, strValue, true));
|
||
}
|
||
|
||
role
|
||
Accessible::ARIATransformRole(role aRole)
|
||
{
|
||
// XXX: these unfortunate exceptions don't fit into the ARIA table. This is
|
||
// where the accessible role depends on both the role and ARIA state.
|
||
if (aRole == roles::PUSHBUTTON) {
|
||
if (nsAccUtils::HasDefinedARIAToken(mContent, nsGkAtoms::aria_pressed)) {
|
||
// For simplicity, any existing pressed attribute except "" or "undefined"
|
||
// indicates a toggle.
|
||
return roles::TOGGLE_BUTTON;
|
||
}
|
||
|
||
if (mContent->AttrValueIs(kNameSpaceID_None,
|
||
nsGkAtoms::aria_haspopup,
|
||
nsGkAtoms::_true,
|
||
eCaseMatters)) {
|
||
// For button with aria-haspopup="true".
|
||
return roles::BUTTONMENU;
|
||
}
|
||
|
||
} else if (aRole == roles::LISTBOX) {
|
||
// A listbox inside of a combobox needs a special role because of ATK
|
||
// mapping to menu.
|
||
if (mParent && mParent->Role() == roles::COMBOBOX) {
|
||
return roles::COMBOBOX_LIST;
|
||
} else {
|
||
// Listbox is owned by a combobox
|
||
Relation rel = RelationByType(RelationType::NODE_CHILD_OF);
|
||
Accessible* targetAcc = nullptr;
|
||
while ((targetAcc = rel.Next()))
|
||
if (targetAcc->Role() == roles::COMBOBOX)
|
||
return roles::COMBOBOX_LIST;
|
||
}
|
||
|
||
} else if (aRole == roles::OPTION) {
|
||
if (mParent && mParent->Role() == roles::COMBOBOX_LIST)
|
||
return roles::COMBOBOX_OPTION;
|
||
|
||
} else if (aRole == roles::MENUITEM) {
|
||
// Menuitem has a submenu.
|
||
if (mContent->AttrValueIs(kNameSpaceID_None, nsGkAtoms::aria_haspopup,
|
||
nsGkAtoms::_true, eCaseMatters)) {
|
||
return roles::PARENT_MENUITEM;
|
||
}
|
||
}
|
||
|
||
return aRole;
|
||
}
|
||
|
||
nsIAtom*
|
||
Accessible::LandmarkRole() const
|
||
{
|
||
return mRoleMapEntry && mRoleMapEntry->IsOfType(eLandmark) ?
|
||
*(mRoleMapEntry->roleAtom) : nullptr;
|
||
}
|
||
|
||
role
|
||
Accessible::NativeRole()
|
||
{
|
||
return roles::NOTHING;
|
||
}
|
||
|
||
uint8_t
|
||
Accessible::ActionCount()
|
||
{
|
||
return GetActionRule() == eNoAction ? 0 : 1;
|
||
}
|
||
|
||
void
|
||
Accessible::ActionNameAt(uint8_t aIndex, nsAString& aName)
|
||
{
|
||
aName.Truncate();
|
||
|
||
if (aIndex != 0)
|
||
return;
|
||
|
||
uint32_t actionRule = GetActionRule();
|
||
|
||
switch (actionRule) {
|
||
case eActivateAction:
|
||
aName.AssignLiteral("activate");
|
||
return;
|
||
|
||
case eClickAction:
|
||
aName.AssignLiteral("click");
|
||
return;
|
||
|
||
case ePressAction:
|
||
aName.AssignLiteral("press");
|
||
return;
|
||
|
||
case eCheckUncheckAction:
|
||
{
|
||
uint64_t state = State();
|
||
if (state & states::CHECKED)
|
||
aName.AssignLiteral("uncheck");
|
||
else if (state & states::MIXED)
|
||
aName.AssignLiteral("cycle");
|
||
else
|
||
aName.AssignLiteral("check");
|
||
return;
|
||
}
|
||
|
||
case eJumpAction:
|
||
aName.AssignLiteral("jump");
|
||
return;
|
||
|
||
case eOpenCloseAction:
|
||
if (State() & states::COLLAPSED)
|
||
aName.AssignLiteral("open");
|
||
else
|
||
aName.AssignLiteral("close");
|
||
return;
|
||
|
||
case eSelectAction:
|
||
aName.AssignLiteral("select");
|
||
return;
|
||
|
||
case eSwitchAction:
|
||
aName.AssignLiteral("switch");
|
||
return;
|
||
|
||
case eSortAction:
|
||
aName.AssignLiteral("sort");
|
||
return;
|
||
|
||
case eExpandAction:
|
||
if (State() & states::COLLAPSED)
|
||
aName.AssignLiteral("expand");
|
||
else
|
||
aName.AssignLiteral("collapse");
|
||
return;
|
||
}
|
||
}
|
||
|
||
bool
|
||
Accessible::DoAction(uint8_t aIndex)
|
||
{
|
||
if (aIndex != 0)
|
||
return false;
|
||
|
||
if (GetActionRule() != eNoAction) {
|
||
DoCommand();
|
||
return true;
|
||
}
|
||
|
||
return false;
|
||
}
|
||
|
||
nsIContent*
|
||
Accessible::GetAtomicRegion() const
|
||
{
|
||
nsIContent *loopContent = mContent;
|
||
nsAutoString atomic;
|
||
while (loopContent && !loopContent->GetAttr(kNameSpaceID_None, nsGkAtoms::aria_atomic, atomic))
|
||
loopContent = loopContent->GetParent();
|
||
|
||
return atomic.EqualsLiteral("true") ? loopContent : nullptr;
|
||
}
|
||
|
||
Relation
|
||
Accessible::RelationByType(RelationType aType)
|
||
{
|
||
if (!HasOwnContent())
|
||
return Relation();
|
||
|
||
// Relationships are defined on the same content node that the role would be
|
||
// defined on.
|
||
switch (aType) {
|
||
case RelationType::LABELLED_BY: {
|
||
Relation rel(new IDRefsIterator(mDoc, mContent,
|
||
nsGkAtoms::aria_labelledby));
|
||
if (mContent->IsHTMLElement()) {
|
||
rel.AppendIter(new HTMLLabelIterator(Document(), this));
|
||
} else if (mContent->IsXULElement()) {
|
||
rel.AppendIter(new XULLabelIterator(Document(), mContent));
|
||
}
|
||
|
||
return rel;
|
||
}
|
||
|
||
case RelationType::LABEL_FOR: {
|
||
Relation rel(new RelatedAccIterator(Document(), mContent,
|
||
nsGkAtoms::aria_labelledby));
|
||
if (mContent->IsXULElement(nsGkAtoms::label))
|
||
rel.AppendIter(new IDRefsIterator(mDoc, mContent, nsGkAtoms::control));
|
||
|
||
return rel;
|
||
}
|
||
|
||
case RelationType::DESCRIBED_BY: {
|
||
Relation rel(new IDRefsIterator(mDoc, mContent,
|
||
nsGkAtoms::aria_describedby));
|
||
if (mContent->IsXULElement())
|
||
rel.AppendIter(new XULDescriptionIterator(Document(), mContent));
|
||
|
||
return rel;
|
||
}
|
||
|
||
case RelationType::DESCRIPTION_FOR: {
|
||
Relation rel(new RelatedAccIterator(Document(), mContent,
|
||
nsGkAtoms::aria_describedby));
|
||
|
||
// This affectively adds an optional control attribute to xul:description,
|
||
// which only affects accessibility, by allowing the description to be
|
||
// tied to a control.
|
||
if (mContent->IsXULElement(nsGkAtoms::description))
|
||
rel.AppendIter(new IDRefsIterator(mDoc, mContent,
|
||
nsGkAtoms::control));
|
||
|
||
return rel;
|
||
}
|
||
|
||
case RelationType::NODE_CHILD_OF: {
|
||
Relation rel;
|
||
// This is an ARIA tree or treegrid that doesn't use owns, so we need to
|
||
// get the parent the hard way.
|
||
if (mRoleMapEntry && (mRoleMapEntry->role == roles::OUTLINEITEM ||
|
||
mRoleMapEntry->role == roles::LISTITEM ||
|
||
mRoleMapEntry->role == roles::ROW)) {
|
||
rel.AppendTarget(GetGroupInfo()->ConceptualParent());
|
||
}
|
||
|
||
// If accessible is in its own Window, or is the root of a document,
|
||
// then we should provide NODE_CHILD_OF relation so that MSAA clients
|
||
// can easily get to true parent instead of getting to oleacc's
|
||
// ROLE_WINDOW accessible which will prevent us from going up further
|
||
// (because it is system generated and has no idea about the hierarchy
|
||
// above it).
|
||
nsIFrame *frame = GetFrame();
|
||
if (frame) {
|
||
nsView *view = frame->GetViewExternal();
|
||
if (view) {
|
||
nsIScrollableFrame *scrollFrame = do_QueryFrame(frame);
|
||
if (scrollFrame || view->GetWidget() || !frame->GetParent())
|
||
rel.AppendTarget(Parent());
|
||
}
|
||
}
|
||
|
||
return rel;
|
||
}
|
||
|
||
case RelationType::NODE_PARENT_OF: {
|
||
// ARIA tree or treegrid can do the hierarchy by @aria-level, ARIA trees
|
||
// also can be organized by groups.
|
||
if (mRoleMapEntry &&
|
||
(mRoleMapEntry->role == roles::OUTLINEITEM ||
|
||
mRoleMapEntry->role == roles::LISTITEM ||
|
||
mRoleMapEntry->role == roles::ROW ||
|
||
mRoleMapEntry->role == roles::OUTLINE ||
|
||
mRoleMapEntry->role == roles::LIST ||
|
||
mRoleMapEntry->role == roles::TREE_TABLE)) {
|
||
return Relation(new ItemIterator(this));
|
||
}
|
||
|
||
return Relation();
|
||
}
|
||
|
||
case RelationType::CONTROLLED_BY:
|
||
return Relation(new RelatedAccIterator(Document(), mContent,
|
||
nsGkAtoms::aria_controls));
|
||
|
||
case RelationType::CONTROLLER_FOR: {
|
||
Relation rel(new IDRefsIterator(mDoc, mContent,
|
||
nsGkAtoms::aria_controls));
|
||
rel.AppendIter(new HTMLOutputIterator(Document(), mContent));
|
||
return rel;
|
||
}
|
||
|
||
case RelationType::FLOWS_TO:
|
||
return Relation(new IDRefsIterator(mDoc, mContent,
|
||
nsGkAtoms::aria_flowto));
|
||
|
||
case RelationType::FLOWS_FROM:
|
||
return Relation(new RelatedAccIterator(Document(), mContent,
|
||
nsGkAtoms::aria_flowto));
|
||
|
||
case RelationType::MEMBER_OF:
|
||
return Relation(mDoc, GetAtomicRegion());
|
||
|
||
case RelationType::SUBWINDOW_OF:
|
||
case RelationType::EMBEDS:
|
||
case RelationType::EMBEDDED_BY:
|
||
case RelationType::POPUP_FOR:
|
||
case RelationType::PARENT_WINDOW_OF:
|
||
return Relation();
|
||
|
||
case RelationType::DEFAULT_BUTTON: {
|
||
if (mContent->IsHTMLElement()) {
|
||
// HTML form controls implements nsIFormControl interface.
|
||
nsCOMPtr<nsIFormControl> control(do_QueryInterface(mContent));
|
||
if (control) {
|
||
nsCOMPtr<nsIForm> form(do_QueryInterface(control->GetFormElement()));
|
||
if (form) {
|
||
nsCOMPtr<nsIContent> formContent =
|
||
do_QueryInterface(form->GetDefaultSubmitElement());
|
||
return Relation(mDoc, formContent);
|
||
}
|
||
}
|
||
} else {
|
||
// In XUL, use first <button default="true" .../> in the document
|
||
nsCOMPtr<nsIDOMXULDocument> xulDoc =
|
||
do_QueryInterface(mContent->OwnerDoc());
|
||
nsCOMPtr<nsIDOMXULButtonElement> buttonEl;
|
||
if (xulDoc) {
|
||
nsCOMPtr<nsIDOMNodeList> possibleDefaultButtons;
|
||
xulDoc->GetElementsByAttribute(NS_LITERAL_STRING("default"),
|
||
NS_LITERAL_STRING("true"),
|
||
getter_AddRefs(possibleDefaultButtons));
|
||
if (possibleDefaultButtons) {
|
||
uint32_t length;
|
||
possibleDefaultButtons->GetLength(&length);
|
||
nsCOMPtr<nsIDOMNode> possibleButton;
|
||
// Check for button in list of default="true" elements
|
||
for (uint32_t count = 0; count < length && !buttonEl; count ++) {
|
||
possibleDefaultButtons->Item(count, getter_AddRefs(possibleButton));
|
||
buttonEl = do_QueryInterface(possibleButton);
|
||
}
|
||
}
|
||
if (!buttonEl) { // Check for anonymous accept button in <dialog>
|
||
dom::Element* rootElm = mContent->OwnerDoc()->GetRootElement();
|
||
if (rootElm) {
|
||
nsIContent* possibleButtonEl = rootElm->OwnerDoc()->
|
||
GetAnonymousElementByAttribute(rootElm, nsGkAtoms::_default,
|
||
NS_LITERAL_STRING("true"));
|
||
buttonEl = do_QueryInterface(possibleButtonEl);
|
||
}
|
||
}
|
||
nsCOMPtr<nsIContent> relatedContent(do_QueryInterface(buttonEl));
|
||
return Relation(mDoc, relatedContent);
|
||
}
|
||
}
|
||
return Relation();
|
||
}
|
||
|
||
case RelationType::CONTAINING_DOCUMENT:
|
||
return Relation(mDoc);
|
||
|
||
case RelationType::CONTAINING_TAB_PANE: {
|
||
nsCOMPtr<nsIDocShell> docShell =
|
||
nsCoreUtils::GetDocShellFor(GetNode());
|
||
if (docShell) {
|
||
// Walk up the parent chain without crossing the boundary at which item
|
||
// types change, preventing us from walking up out of tab content.
|
||
nsCOMPtr<nsIDocShellTreeItem> root;
|
||
docShell->GetSameTypeRootTreeItem(getter_AddRefs(root));
|
||
if (root) {
|
||
// If the item type is typeContent, we assume we are in browser tab
|
||
// content. Note, this includes content such as about:addons,
|
||
// for consistency.
|
||
if (root->ItemType() == nsIDocShellTreeItem::typeContent) {
|
||
return Relation(nsAccUtils::GetDocAccessibleFor(root));
|
||
}
|
||
}
|
||
}
|
||
return Relation();
|
||
}
|
||
|
||
case RelationType::CONTAINING_APPLICATION:
|
||
return Relation(ApplicationAcc());
|
||
|
||
default:
|
||
return Relation();
|
||
}
|
||
}
|
||
|
||
void
|
||
Accessible::GetNativeInterface(void** aNativeAccessible)
|
||
{
|
||
}
|
||
|
||
void
|
||
Accessible::DoCommand(nsIContent *aContent, uint32_t aActionIndex)
|
||
{
|
||
class Runnable final : public nsRunnable
|
||
{
|
||
public:
|
||
Runnable(Accessible* aAcc, nsIContent* aContent, uint32_t aIdx) :
|
||
mAcc(aAcc), mContent(aContent), mIdx(aIdx) { }
|
||
|
||
NS_IMETHOD Run() override
|
||
{
|
||
if (mAcc)
|
||
mAcc->DispatchClickEvent(mContent, mIdx);
|
||
|
||
return NS_OK;
|
||
}
|
||
|
||
void Revoke()
|
||
{
|
||
mAcc = nullptr;
|
||
mContent = nullptr;
|
||
}
|
||
|
||
private:
|
||
RefPtr<Accessible> mAcc;
|
||
nsCOMPtr<nsIContent> mContent;
|
||
uint32_t mIdx;
|
||
};
|
||
|
||
nsIContent* content = aContent ? aContent : mContent.get();
|
||
nsCOMPtr<nsIRunnable> runnable = new Runnable(this, content, aActionIndex);
|
||
NS_DispatchToMainThread(runnable);
|
||
}
|
||
|
||
void
|
||
Accessible::DispatchClickEvent(nsIContent *aContent, uint32_t aActionIndex)
|
||
{
|
||
if (IsDefunct())
|
||
return;
|
||
|
||
nsCOMPtr<nsIPresShell> presShell = mDoc->PresShell();
|
||
|
||
// Scroll into view.
|
||
presShell->ScrollContentIntoView(aContent,
|
||
nsIPresShell::ScrollAxis(),
|
||
nsIPresShell::ScrollAxis(),
|
||
nsIPresShell::SCROLL_OVERFLOW_HIDDEN);
|
||
|
||
nsWeakFrame frame = aContent->GetPrimaryFrame();
|
||
if (!frame)
|
||
return;
|
||
|
||
// Compute x and y coordinates.
|
||
nsPoint point;
|
||
nsCOMPtr<nsIWidget> widget = frame->GetNearestWidget(point);
|
||
if (!widget)
|
||
return;
|
||
|
||
nsSize size = frame->GetSize();
|
||
|
||
RefPtr<nsPresContext> presContext = presShell->GetPresContext();
|
||
int32_t x = presContext->AppUnitsToDevPixels(point.x + size.width / 2);
|
||
int32_t y = presContext->AppUnitsToDevPixels(point.y + size.height / 2);
|
||
|
||
// Simulate a touch interaction by dispatching touch events with mouse events.
|
||
nsCoreUtils::DispatchTouchEvent(eTouchStart, x, y, aContent, frame,
|
||
presShell, widget);
|
||
nsCoreUtils::DispatchMouseEvent(eMouseDown, x, y, aContent, frame,
|
||
presShell, widget);
|
||
nsCoreUtils::DispatchTouchEvent(eTouchEnd, x, y, aContent, frame,
|
||
presShell, widget);
|
||
nsCoreUtils::DispatchMouseEvent(eMouseUp, x, y, aContent, frame,
|
||
presShell, widget);
|
||
}
|
||
|
||
void
|
||
Accessible::ScrollToPoint(uint32_t aCoordinateType, int32_t aX, int32_t aY)
|
||
{
|
||
nsIFrame* frame = GetFrame();
|
||
if (!frame)
|
||
return;
|
||
|
||
nsIntPoint coords =
|
||
nsAccUtils::ConvertToScreenCoords(aX, aY, aCoordinateType, this);
|
||
|
||
nsIFrame* parentFrame = frame;
|
||
while ((parentFrame = parentFrame->GetParent()))
|
||
nsCoreUtils::ScrollFrameToPoint(parentFrame, frame, coords);
|
||
}
|
||
|
||
void
|
||
Accessible::AppendTextTo(nsAString& aText, uint32_t aStartOffset,
|
||
uint32_t aLength)
|
||
{
|
||
// Return text representation of non-text accessible within hypertext
|
||
// accessible. Text accessible overrides this method to return enclosed text.
|
||
if (aStartOffset != 0 || aLength == 0)
|
||
return;
|
||
|
||
nsIFrame *frame = GetFrame();
|
||
if (!frame)
|
||
return;
|
||
|
||
NS_ASSERTION(mParent,
|
||
"Called on accessible unbound from tree. Result can be wrong.");
|
||
|
||
if (frame->GetType() == nsGkAtoms::brFrame) {
|
||
aText += kForcedNewLineChar;
|
||
} else if (mParent && nsAccUtils::MustPrune(mParent)) {
|
||
// Expose the embedded object accessible as imaginary embedded object
|
||
// character if its parent hypertext accessible doesn't expose children to
|
||
// AT.
|
||
aText += kImaginaryEmbeddedObjectChar;
|
||
} else {
|
||
aText += kEmbeddedObjectChar;
|
||
}
|
||
}
|
||
|
||
void
|
||
Accessible::Shutdown()
|
||
{
|
||
// Mark the accessible as defunct, invalidate the child count and pointers to
|
||
// other accessibles, also make sure none of its children point to this parent
|
||
mStateFlags |= eIsDefunct;
|
||
|
||
InvalidateChildren();
|
||
if (mParent)
|
||
mParent->RemoveChild(this);
|
||
|
||
mContent = nullptr;
|
||
mDoc = nullptr;
|
||
if (SelectionMgr() && SelectionMgr()->AccessibleWithCaret(nullptr) == this)
|
||
SelectionMgr()->ResetCaretOffset();
|
||
}
|
||
|
||
// Accessible protected
|
||
void
|
||
Accessible::ARIAName(nsString& aName)
|
||
{
|
||
// aria-labelledby now takes precedence over aria-label
|
||
nsresult rv = nsTextEquivUtils::
|
||
GetTextEquivFromIDRefs(this, nsGkAtoms::aria_labelledby, aName);
|
||
if (NS_SUCCEEDED(rv)) {
|
||
aName.CompressWhitespace();
|
||
}
|
||
|
||
if (aName.IsEmpty() &&
|
||
mContent->GetAttr(kNameSpaceID_None, nsGkAtoms::aria_label, aName)) {
|
||
aName.CompressWhitespace();
|
||
}
|
||
}
|
||
|
||
// Accessible protected
|
||
ENameValueFlag
|
||
Accessible::NativeName(nsString& aName)
|
||
{
|
||
if (mContent->IsHTMLElement()) {
|
||
Accessible* label = nullptr;
|
||
HTMLLabelIterator iter(Document(), this);
|
||
while ((label = iter.Next())) {
|
||
nsTextEquivUtils::AppendTextEquivFromContent(this, label->GetContent(),
|
||
&aName);
|
||
aName.CompressWhitespace();
|
||
}
|
||
|
||
if (!aName.IsEmpty())
|
||
return eNameOK;
|
||
|
||
nsTextEquivUtils::GetNameFromSubtree(this, aName);
|
||
return aName.IsEmpty() ? eNameOK : eNameFromSubtree;
|
||
}
|
||
|
||
if (mContent->IsXULElement()) {
|
||
XULElmName(mDoc, mContent, aName);
|
||
if (!aName.IsEmpty())
|
||
return eNameOK;
|
||
|
||
nsTextEquivUtils::GetNameFromSubtree(this, aName);
|
||
return aName.IsEmpty() ? eNameOK : eNameFromSubtree;
|
||
}
|
||
|
||
if (mContent->IsSVGElement()) {
|
||
// If user agents need to choose among multiple ‘desc’ or ‘title’ elements
|
||
// for processing, the user agent shall choose the first one.
|
||
for (nsIContent* childElm = mContent->GetFirstChild(); childElm;
|
||
childElm = childElm->GetNextSibling()) {
|
||
if (childElm->IsSVGElement(nsGkAtoms::title)) {
|
||
nsTextEquivUtils::AppendTextEquivFromContent(this, childElm, &aName);
|
||
return eNameOK;
|
||
}
|
||
}
|
||
}
|
||
|
||
return eNameOK;
|
||
}
|
||
|
||
// Accessible protected
|
||
void
|
||
Accessible::BindToParent(Accessible* aParent, uint32_t aIndexInParent)
|
||
{
|
||
NS_PRECONDITION(aParent, "This method isn't used to set null parent!");
|
||
|
||
if (mParent) {
|
||
if (mParent != aParent) {
|
||
NS_ERROR("Adopting child!");
|
||
mParent->InvalidateChildrenGroupInfo();
|
||
mParent->RemoveChild(this);
|
||
} else {
|
||
NS_ERROR("Binding to the same parent!");
|
||
return;
|
||
}
|
||
}
|
||
|
||
mParent = aParent;
|
||
mIndexInParent = aIndexInParent;
|
||
|
||
#ifdef DEBUG
|
||
AssertInMutatingSubtree();
|
||
#endif
|
||
|
||
// Note: this is currently only used for richlistitems and their children.
|
||
if (mParent->HasNameDependentParent() || mParent->IsXULListItem())
|
||
mContextFlags |= eHasNameDependentParent;
|
||
else
|
||
mContextFlags &= ~eHasNameDependentParent;
|
||
|
||
if (mParent->IsARIAHidden() || aria::HasDefinedARIAHidden(mContent))
|
||
SetARIAHidden(true);
|
||
}
|
||
|
||
// Accessible protected
|
||
void
|
||
Accessible::UnbindFromParent()
|
||
{
|
||
#ifdef DEBUG
|
||
AssertInMutatingSubtree();
|
||
#endif
|
||
mParent = nullptr;
|
||
mIndexInParent = -1;
|
||
mInt.mIndexOfEmbeddedChild = -1;
|
||
if (IsProxy())
|
||
MOZ_CRASH("this should never be called on proxy wrappers");
|
||
|
||
delete mBits.groupInfo;
|
||
mBits.groupInfo = nullptr;
|
||
mContextFlags &= ~eHasNameDependentParent;
|
||
}
|
||
|
||
////////////////////////////////////////////////////////////////////////////////
|
||
// Accessible public methods
|
||
|
||
RootAccessible*
|
||
Accessible::RootAccessible() const
|
||
{
|
||
nsCOMPtr<nsIDocShell> docShell = nsCoreUtils::GetDocShellFor(GetNode());
|
||
NS_ASSERTION(docShell, "No docshell for mContent");
|
||
if (!docShell) {
|
||
return nullptr;
|
||
}
|
||
|
||
nsCOMPtr<nsIDocShellTreeItem> root;
|
||
docShell->GetRootTreeItem(getter_AddRefs(root));
|
||
NS_ASSERTION(root, "No root content tree item");
|
||
if (!root) {
|
||
return nullptr;
|
||
}
|
||
|
||
DocAccessible* docAcc = nsAccUtils::GetDocAccessibleFor(root);
|
||
return docAcc ? docAcc->AsRoot() : nullptr;
|
||
}
|
||
|
||
nsIFrame*
|
||
Accessible::GetFrame() const
|
||
{
|
||
return mContent ? mContent->GetPrimaryFrame() : nullptr;
|
||
}
|
||
|
||
nsINode*
|
||
Accessible::GetNode() const
|
||
{
|
||
return mContent;
|
||
}
|
||
|
||
void
|
||
Accessible::Language(nsAString& aLanguage)
|
||
{
|
||
aLanguage.Truncate();
|
||
|
||
if (!mDoc)
|
||
return;
|
||
|
||
nsCoreUtils::GetLanguageFor(mContent, nullptr, aLanguage);
|
||
if (aLanguage.IsEmpty()) { // Nothing found, so use document's language
|
||
mDoc->DocumentNode()->GetHeaderData(nsGkAtoms::headerContentLanguage,
|
||
aLanguage);
|
||
}
|
||
}
|
||
|
||
void
|
||
Accessible::InvalidateChildren()
|
||
{
|
||
int32_t childCount = mChildren.Length();
|
||
for (int32_t childIdx = 0; childIdx < childCount; childIdx++) {
|
||
mChildren.ElementAt(childIdx)->UnbindFromParent();
|
||
}
|
||
|
||
mEmbeddedObjCollector = nullptr;
|
||
mChildren.Clear();
|
||
SetChildrenFlag(eChildrenUninitialized);
|
||
}
|
||
|
||
bool
|
||
Accessible::InsertChildAt(uint32_t aIndex, Accessible* aChild)
|
||
{
|
||
if (!aChild)
|
||
return false;
|
||
|
||
if (aIndex == mChildren.Length()) {
|
||
if (!mChildren.AppendElement(aChild))
|
||
return false;
|
||
|
||
} else {
|
||
if (!mChildren.InsertElementAt(aIndex, aChild))
|
||
return false;
|
||
|
||
for (uint32_t idx = aIndex + 1; idx < mChildren.Length(); idx++) {
|
||
NS_ASSERTION(static_cast<uint32_t>(mChildren[idx]->mIndexInParent) == idx - 1,
|
||
"Accessible child index doesn't match");
|
||
mChildren[idx]->mIndexInParent = idx;
|
||
}
|
||
|
||
mEmbeddedObjCollector = nullptr;
|
||
}
|
||
|
||
if (!nsAccUtils::IsEmbeddedObject(aChild))
|
||
SetChildrenFlag(eMixedChildren);
|
||
|
||
aChild->BindToParent(this, aIndex);
|
||
return true;
|
||
}
|
||
|
||
bool
|
||
Accessible::RemoveChild(Accessible* aChild)
|
||
{
|
||
if (!aChild)
|
||
return false;
|
||
|
||
if (aChild->mParent != this || aChild->mIndexInParent == -1)
|
||
return false;
|
||
|
||
uint32_t index = static_cast<uint32_t>(aChild->mIndexInParent);
|
||
if (index >= mChildren.Length() || mChildren[index] != aChild) {
|
||
NS_ERROR("Child is bound to parent but parent hasn't this child at its index!");
|
||
aChild->UnbindFromParent();
|
||
return false;
|
||
}
|
||
|
||
for (uint32_t idx = index + 1; idx < mChildren.Length(); idx++) {
|
||
NS_ASSERTION(static_cast<uint32_t>(mChildren[idx]->mIndexInParent) == idx,
|
||
"Accessible child index doesn't match");
|
||
mChildren[idx]->mIndexInParent = idx - 1;
|
||
}
|
||
|
||
aChild->UnbindFromParent();
|
||
mChildren.RemoveElementAt(index);
|
||
mEmbeddedObjCollector = nullptr;
|
||
|
||
return true;
|
||
}
|
||
|
||
Accessible*
|
||
Accessible::GetChildAt(uint32_t aIndex) const
|
||
{
|
||
Accessible* child = mChildren.SafeElementAt(aIndex, nullptr);
|
||
if (!child)
|
||
return nullptr;
|
||
|
||
#ifdef DEBUG
|
||
Accessible* realParent = child->mParent;
|
||
NS_ASSERTION(!realParent || realParent == this,
|
||
"Two accessibles have the same first child accessible!");
|
||
#endif
|
||
|
||
return child;
|
||
}
|
||
|
||
uint32_t
|
||
Accessible::ChildCount() const
|
||
{
|
||
return mChildren.Length();
|
||
}
|
||
|
||
int32_t
|
||
Accessible::IndexInParent() const
|
||
{
|
||
return mIndexInParent;
|
||
}
|
||
|
||
uint32_t
|
||
Accessible::EmbeddedChildCount()
|
||
{
|
||
if (IsChildrenFlag(eMixedChildren)) {
|
||
if (!mEmbeddedObjCollector)
|
||
mEmbeddedObjCollector = new EmbeddedObjCollector(this);
|
||
return mEmbeddedObjCollector->Count();
|
||
}
|
||
|
||
return ChildCount();
|
||
}
|
||
|
||
Accessible*
|
||
Accessible::GetEmbeddedChildAt(uint32_t aIndex)
|
||
{
|
||
if (IsChildrenFlag(eMixedChildren)) {
|
||
if (!mEmbeddedObjCollector)
|
||
mEmbeddedObjCollector = new EmbeddedObjCollector(this);
|
||
return mEmbeddedObjCollector ?
|
||
mEmbeddedObjCollector->GetAccessibleAt(aIndex) : nullptr;
|
||
}
|
||
|
||
return GetChildAt(aIndex);
|
||
}
|
||
|
||
int32_t
|
||
Accessible::GetIndexOfEmbeddedChild(Accessible* aChild)
|
||
{
|
||
if (IsChildrenFlag(eMixedChildren)) {
|
||
if (!mEmbeddedObjCollector)
|
||
mEmbeddedObjCollector = new EmbeddedObjCollector(this);
|
||
return mEmbeddedObjCollector ?
|
||
mEmbeddedObjCollector->GetIndexAt(aChild) : -1;
|
||
}
|
||
|
||
return GetIndexOf(aChild);
|
||
}
|
||
|
||
////////////////////////////////////////////////////////////////////////////////
|
||
// HyperLinkAccessible methods
|
||
|
||
bool
|
||
Accessible::IsLink()
|
||
{
|
||
// Every embedded accessible within hypertext accessible implements
|
||
// hyperlink interface.
|
||
return mParent && mParent->IsHyperText() && nsAccUtils::IsEmbeddedObject(this);
|
||
}
|
||
|
||
uint32_t
|
||
Accessible::StartOffset()
|
||
{
|
||
NS_PRECONDITION(IsLink(), "StartOffset is called not on hyper link!");
|
||
|
||
HyperTextAccessible* hyperText = mParent ? mParent->AsHyperText() : nullptr;
|
||
return hyperText ? hyperText->GetChildOffset(this) : 0;
|
||
}
|
||
|
||
uint32_t
|
||
Accessible::EndOffset()
|
||
{
|
||
NS_PRECONDITION(IsLink(), "EndOffset is called on not hyper link!");
|
||
|
||
HyperTextAccessible* hyperText = mParent ? mParent->AsHyperText() : nullptr;
|
||
return hyperText ? (hyperText->GetChildOffset(this) + 1) : 0;
|
||
}
|
||
|
||
uint32_t
|
||
Accessible::AnchorCount()
|
||
{
|
||
NS_PRECONDITION(IsLink(), "AnchorCount is called on not hyper link!");
|
||
return 1;
|
||
}
|
||
|
||
Accessible*
|
||
Accessible::AnchorAt(uint32_t aAnchorIndex)
|
||
{
|
||
NS_PRECONDITION(IsLink(), "GetAnchor is called on not hyper link!");
|
||
return aAnchorIndex == 0 ? this : nullptr;
|
||
}
|
||
|
||
already_AddRefed<nsIURI>
|
||
Accessible::AnchorURIAt(uint32_t aAnchorIndex)
|
||
{
|
||
NS_PRECONDITION(IsLink(), "AnchorURIAt is called on not hyper link!");
|
||
return nullptr;
|
||
}
|
||
|
||
|
||
////////////////////////////////////////////////////////////////////////////////
|
||
// SelectAccessible
|
||
|
||
void
|
||
Accessible::SelectedItems(nsTArray<Accessible*>* aItems)
|
||
{
|
||
AccIterator iter(this, filters::GetSelected);
|
||
Accessible* selected = nullptr;
|
||
while ((selected = iter.Next()))
|
||
aItems->AppendElement(selected);
|
||
}
|
||
|
||
uint32_t
|
||
Accessible::SelectedItemCount()
|
||
{
|
||
uint32_t count = 0;
|
||
AccIterator iter(this, filters::GetSelected);
|
||
Accessible* selected = nullptr;
|
||
while ((selected = iter.Next()))
|
||
++count;
|
||
|
||
return count;
|
||
}
|
||
|
||
Accessible*
|
||
Accessible::GetSelectedItem(uint32_t aIndex)
|
||
{
|
||
AccIterator iter(this, filters::GetSelected);
|
||
Accessible* selected = nullptr;
|
||
|
||
uint32_t index = 0;
|
||
while ((selected = iter.Next()) && index < aIndex)
|
||
index++;
|
||
|
||
return selected;
|
||
}
|
||
|
||
bool
|
||
Accessible::IsItemSelected(uint32_t aIndex)
|
||
{
|
||
uint32_t index = 0;
|
||
AccIterator iter(this, filters::GetSelectable);
|
||
Accessible* selected = nullptr;
|
||
while ((selected = iter.Next()) && index < aIndex)
|
||
index++;
|
||
|
||
return selected &&
|
||
selected->State() & states::SELECTED;
|
||
}
|
||
|
||
bool
|
||
Accessible::AddItemToSelection(uint32_t aIndex)
|
||
{
|
||
uint32_t index = 0;
|
||
AccIterator iter(this, filters::GetSelectable);
|
||
Accessible* selected = nullptr;
|
||
while ((selected = iter.Next()) && index < aIndex)
|
||
index++;
|
||
|
||
if (selected)
|
||
selected->SetSelected(true);
|
||
|
||
return static_cast<bool>(selected);
|
||
}
|
||
|
||
bool
|
||
Accessible::RemoveItemFromSelection(uint32_t aIndex)
|
||
{
|
||
uint32_t index = 0;
|
||
AccIterator iter(this, filters::GetSelectable);
|
||
Accessible* selected = nullptr;
|
||
while ((selected = iter.Next()) && index < aIndex)
|
||
index++;
|
||
|
||
if (selected)
|
||
selected->SetSelected(false);
|
||
|
||
return static_cast<bool>(selected);
|
||
}
|
||
|
||
bool
|
||
Accessible::SelectAll()
|
||
{
|
||
bool success = false;
|
||
Accessible* selectable = nullptr;
|
||
|
||
AccIterator iter(this, filters::GetSelectable);
|
||
while((selectable = iter.Next())) {
|
||
success = true;
|
||
selectable->SetSelected(true);
|
||
}
|
||
return success;
|
||
}
|
||
|
||
bool
|
||
Accessible::UnselectAll()
|
||
{
|
||
bool success = false;
|
||
Accessible* selected = nullptr;
|
||
|
||
AccIterator iter(this, filters::GetSelected);
|
||
while ((selected = iter.Next())) {
|
||
success = true;
|
||
selected->SetSelected(false);
|
||
}
|
||
return success;
|
||
}
|
||
|
||
////////////////////////////////////////////////////////////////////////////////
|
||
// Widgets
|
||
|
||
bool
|
||
Accessible::IsWidget() const
|
||
{
|
||
return false;
|
||
}
|
||
|
||
bool
|
||
Accessible::IsActiveWidget() const
|
||
{
|
||
if (FocusMgr()->HasDOMFocus(mContent))
|
||
return true;
|
||
|
||
// If text entry of combobox widget has a focus then the combobox widget is
|
||
// active.
|
||
if (mRoleMapEntry && mRoleMapEntry->Is(nsGkAtoms::combobox)) {
|
||
uint32_t childCount = ChildCount();
|
||
for (uint32_t idx = 0; idx < childCount; idx++) {
|
||
Accessible* child = mChildren.ElementAt(idx);
|
||
if (child->Role() == roles::ENTRY)
|
||
return FocusMgr()->HasDOMFocus(child->GetContent());
|
||
}
|
||
}
|
||
|
||
return false;
|
||
}
|
||
|
||
bool
|
||
Accessible::AreItemsOperable() const
|
||
{
|
||
return HasOwnContent() &&
|
||
mContent->HasAttr(kNameSpaceID_None, nsGkAtoms::aria_activedescendant);
|
||
}
|
||
|
||
Accessible*
|
||
Accessible::CurrentItem()
|
||
{
|
||
// Check for aria-activedescendant, which changes which element has focus.
|
||
// For activedescendant, the ARIA spec does not require that the user agent
|
||
// checks whether pointed node is actually a DOM descendant of the element
|
||
// with the aria-activedescendant attribute.
|
||
nsAutoString id;
|
||
if (HasOwnContent() &&
|
||
mContent->GetAttr(kNameSpaceID_None,
|
||
nsGkAtoms::aria_activedescendant, id)) {
|
||
nsIDocument* DOMDoc = mContent->OwnerDoc();
|
||
dom::Element* activeDescendantElm = DOMDoc->GetElementById(id);
|
||
if (activeDescendantElm) {
|
||
if (nsContentUtils::ContentIsDescendantOf(mContent,
|
||
activeDescendantElm)) {
|
||
// Don't want a cyclical descendant relationship. That would be bad.
|
||
return nullptr;
|
||
}
|
||
|
||
DocAccessible* document = Document();
|
||
if (document)
|
||
return document->GetAccessible(activeDescendantElm);
|
||
}
|
||
}
|
||
return nullptr;
|
||
}
|
||
|
||
void
|
||
Accessible::SetCurrentItem(Accessible* aItem)
|
||
{
|
||
nsIAtom* id = aItem->GetContent()->GetID();
|
||
if (id) {
|
||
nsAutoString idStr;
|
||
id->ToString(idStr);
|
||
mContent->SetAttr(kNameSpaceID_None,
|
||
nsGkAtoms::aria_activedescendant, idStr, true);
|
||
}
|
||
}
|
||
|
||
Accessible*
|
||
Accessible::ContainerWidget() const
|
||
{
|
||
if (HasARIARole() && mContent->HasID()) {
|
||
for (Accessible* parent = Parent(); parent; parent = parent->Parent()) {
|
||
nsIContent* parentContent = parent->GetContent();
|
||
if (parentContent &&
|
||
parentContent->HasAttr(kNameSpaceID_None,
|
||
nsGkAtoms::aria_activedescendant)) {
|
||
return parent;
|
||
}
|
||
|
||
// Don't cross DOM document boundaries.
|
||
if (parent->IsDoc())
|
||
break;
|
||
}
|
||
}
|
||
return nullptr;
|
||
}
|
||
|
||
void
|
||
Accessible::SetARIAHidden(bool aIsDefined)
|
||
{
|
||
if (aIsDefined)
|
||
mContextFlags |= eARIAHidden;
|
||
else
|
||
mContextFlags &= ~eARIAHidden;
|
||
|
||
uint32_t length = mChildren.Length();
|
||
for (uint32_t i = 0; i < length; i++) {
|
||
mChildren[i]->SetARIAHidden(aIsDefined);
|
||
}
|
||
}
|
||
|
||
////////////////////////////////////////////////////////////////////////////////
|
||
// Accessible protected methods
|
||
|
||
void
|
||
Accessible::LastRelease()
|
||
{
|
||
// First cleanup if needed...
|
||
if (mDoc) {
|
||
Shutdown();
|
||
NS_ASSERTION(!mDoc,
|
||
"A Shutdown() impl forgot to call its parent's Shutdown?");
|
||
}
|
||
// ... then die.
|
||
delete this;
|
||
}
|
||
|
||
void
|
||
Accessible::CacheChildren()
|
||
{
|
||
DocAccessible* doc = Document();
|
||
NS_ENSURE_TRUE_VOID(doc);
|
||
|
||
TreeWalker walker(this, mContent);
|
||
|
||
Accessible* child = nullptr;
|
||
while ((child = walker.NextChild()) && AppendChild(child));
|
||
}
|
||
|
||
void
|
||
Accessible::TestChildCache(Accessible* aCachedChild) const
|
||
{
|
||
#ifdef DEBUG
|
||
int32_t childCount = mChildren.Length();
|
||
if (childCount == 0) {
|
||
NS_ASSERTION(IsChildrenFlag(eChildrenUninitialized),
|
||
"No children but initialized!");
|
||
return;
|
||
}
|
||
|
||
Accessible* child = nullptr;
|
||
for (int32_t childIdx = 0; childIdx < childCount; childIdx++) {
|
||
child = mChildren[childIdx];
|
||
if (child == aCachedChild)
|
||
break;
|
||
}
|
||
|
||
NS_ASSERTION(child == aCachedChild,
|
||
"[TestChildCache] cached accessible wasn't found. Wrong accessible tree!");
|
||
#endif
|
||
}
|
||
|
||
void
|
||
Accessible::EnsureChildren()
|
||
{
|
||
NS_ASSERTION(!IsDefunct(), "Caching children for defunct accessible!");
|
||
|
||
if (!IsChildrenFlag(eChildrenUninitialized))
|
||
return;
|
||
|
||
// State is embedded children until text leaf accessible is appended.
|
||
SetChildrenFlag(eEmbeddedChildren); // Prevent reentry
|
||
CacheChildren();
|
||
}
|
||
|
||
Accessible*
|
||
Accessible::GetSiblingAtOffset(int32_t aOffset, nsresult* aError) const
|
||
{
|
||
if (!mParent || mIndexInParent == -1) {
|
||
if (aError)
|
||
*aError = NS_ERROR_UNEXPECTED;
|
||
|
||
return nullptr;
|
||
}
|
||
|
||
if (aError &&
|
||
mIndexInParent + aOffset >= static_cast<int32_t>(mParent->ChildCount())) {
|
||
*aError = NS_OK; // fail peacefully
|
||
return nullptr;
|
||
}
|
||
|
||
Accessible* child = mParent->GetChildAt(mIndexInParent + aOffset);
|
||
if (aError && !child)
|
||
*aError = NS_ERROR_UNEXPECTED;
|
||
|
||
return child;
|
||
}
|
||
|
||
double
|
||
Accessible::AttrNumericValue(nsIAtom* aAttr) const
|
||
{
|
||
if (!mRoleMapEntry || mRoleMapEntry->valueRule == eNoValue)
|
||
return UnspecifiedNaN<double>();
|
||
|
||
nsAutoString attrValue;
|
||
if (!mContent->GetAttr(kNameSpaceID_None, aAttr, attrValue))
|
||
return UnspecifiedNaN<double>();
|
||
|
||
nsresult error = NS_OK;
|
||
double value = attrValue.ToDouble(&error);
|
||
return NS_FAILED(error) ? UnspecifiedNaN<double>() : value;
|
||
}
|
||
|
||
uint32_t
|
||
Accessible::GetActionRule() const
|
||
{
|
||
if (!HasOwnContent() || (InteractiveState() & states::UNAVAILABLE))
|
||
return eNoAction;
|
||
|
||
// Return "click" action on elements that have an attached popup menu.
|
||
if (mContent->IsXULElement())
|
||
if (mContent->HasAttr(kNameSpaceID_None, nsGkAtoms::popup))
|
||
return eClickAction;
|
||
|
||
// Has registered 'click' event handler.
|
||
bool isOnclick = nsCoreUtils::HasClickListener(mContent);
|
||
|
||
if (isOnclick)
|
||
return eClickAction;
|
||
|
||
// Get an action based on ARIA role.
|
||
if (mRoleMapEntry &&
|
||
mRoleMapEntry->actionRule != eNoAction)
|
||
return mRoleMapEntry->actionRule;
|
||
|
||
// Get an action based on ARIA attribute.
|
||
if (nsAccUtils::HasDefinedARIAToken(mContent,
|
||
nsGkAtoms::aria_expanded))
|
||
return eExpandAction;
|
||
|
||
return eNoAction;
|
||
}
|
||
|
||
AccGroupInfo*
|
||
Accessible::GetGroupInfo()
|
||
{
|
||
if (IsProxy())
|
||
MOZ_CRASH("This should never be called on proxy wrappers");
|
||
|
||
if (mBits.groupInfo){
|
||
if (HasDirtyGroupInfo()) {
|
||
mBits.groupInfo->Update();
|
||
SetDirtyGroupInfo(false);
|
||
}
|
||
|
||
return mBits.groupInfo;
|
||
}
|
||
|
||
mBits.groupInfo = AccGroupInfo::CreateGroupInfo(this);
|
||
return mBits.groupInfo;
|
||
}
|
||
|
||
void
|
||
Accessible::InvalidateChildrenGroupInfo()
|
||
{
|
||
uint32_t length = mChildren.Length();
|
||
for (uint32_t i = 0; i < length; i++) {
|
||
Accessible* child = mChildren[i];
|
||
child->SetDirtyGroupInfo(true);
|
||
}
|
||
}
|
||
|
||
void
|
||
Accessible::GetPositionAndSizeInternal(int32_t *aPosInSet, int32_t *aSetSize)
|
||
{
|
||
AccGroupInfo* groupInfo = GetGroupInfo();
|
||
if (groupInfo) {
|
||
*aPosInSet = groupInfo->PosInSet();
|
||
*aSetSize = groupInfo->SetSize();
|
||
}
|
||
}
|
||
|
||
int32_t
|
||
Accessible::GetLevelInternal()
|
||
{
|
||
int32_t level = nsAccUtils::GetDefaultLevel(this);
|
||
|
||
if (!IsBoundToParent())
|
||
return level;
|
||
|
||
roles::Role role = Role();
|
||
if (role == roles::OUTLINEITEM) {
|
||
// Always expose 'level' attribute for 'outlineitem' accessible. The number
|
||
// of nested 'grouping' accessibles containing 'outlineitem' accessible is
|
||
// its level.
|
||
level = 1;
|
||
|
||
Accessible* parent = this;
|
||
while ((parent = parent->Parent())) {
|
||
roles::Role parentRole = parent->Role();
|
||
|
||
if (parentRole == roles::OUTLINE)
|
||
break;
|
||
if (parentRole == roles::GROUPING)
|
||
++ level;
|
||
|
||
}
|
||
|
||
} else if (role == roles::LISTITEM) {
|
||
// Expose 'level' attribute on nested lists. We support two hierarchies:
|
||
// a) list -> listitem -> list -> listitem (nested list is a last child
|
||
// of listitem of the parent list);
|
||
// b) list -> listitem -> group -> listitem (nested listitems are contained
|
||
// by group that is a last child of the parent listitem).
|
||
|
||
// Calculate 'level' attribute based on number of parent listitems.
|
||
level = 0;
|
||
Accessible* parent = this;
|
||
while ((parent = parent->Parent())) {
|
||
roles::Role parentRole = parent->Role();
|
||
|
||
if (parentRole == roles::LISTITEM)
|
||
++ level;
|
||
else if (parentRole != roles::LIST && parentRole != roles::GROUPING)
|
||
break;
|
||
}
|
||
|
||
if (level == 0) {
|
||
// If this listitem is on top of nested lists then expose 'level'
|
||
// attribute.
|
||
parent = Parent();
|
||
uint32_t siblingCount = parent->ChildCount();
|
||
for (uint32_t siblingIdx = 0; siblingIdx < siblingCount; siblingIdx++) {
|
||
Accessible* sibling = parent->GetChildAt(siblingIdx);
|
||
|
||
Accessible* siblingChild = sibling->LastChild();
|
||
if (siblingChild) {
|
||
roles::Role lastChildRole = siblingChild->Role();
|
||
if (lastChildRole == roles::LIST || lastChildRole == roles::GROUPING)
|
||
return 1;
|
||
}
|
||
}
|
||
} else {
|
||
++ level; // level is 1-index based
|
||
}
|
||
}
|
||
|
||
return level;
|
||
}
|
||
|
||
void
|
||
Accessible::StaticAsserts() const
|
||
{
|
||
static_assert(eLastChildrenFlag <= (1 << kChildrenFlagsBits) - 1,
|
||
"Accessible::mChildrenFlags was oversized by eLastChildrenFlag!");
|
||
static_assert(eLastStateFlag <= (1 << kStateFlagsBits) - 1,
|
||
"Accessible::mStateFlags was oversized by eLastStateFlag!");
|
||
static_assert(eLastAccType <= (1 << kTypeBits) - 1,
|
||
"Accessible::mType was oversized by eLastAccType!");
|
||
static_assert(eLastContextFlag <= (1 << kContextFlagsBits) - 1,
|
||
"Accessible::mContextFlags was oversized by eLastContextFlag!");
|
||
static_assert(eLastAccGenericType <= (1 << kGenericTypesBits) - 1,
|
||
"Accessible::mGenericType was oversized by eLastAccGenericType!");
|
||
}
|
||
|
||
void
|
||
Accessible::AssertInMutatingSubtree() const
|
||
{
|
||
if (IsDoc() || IsApplication())
|
||
return;
|
||
|
||
const Accessible *acc = this;
|
||
while (!acc->IsDoc() && !(acc->mStateFlags & eSubtreeMutating)) {
|
||
acc = acc->Parent();
|
||
if (!acc)
|
||
return;
|
||
}
|
||
|
||
MOZ_ASSERT(acc->mStateFlags & eSubtreeMutating);
|
||
}
|
||
|
||
////////////////////////////////////////////////////////////////////////////////
|
||
// KeyBinding class
|
||
|
||
// static
|
||
uint32_t
|
||
KeyBinding::AccelModifier()
|
||
{
|
||
switch (WidgetInputEvent::AccelModifier()) {
|
||
case MODIFIER_ALT:
|
||
return kAlt;
|
||
case MODIFIER_CONTROL:
|
||
return kControl;
|
||
case MODIFIER_META:
|
||
return kMeta;
|
||
case MODIFIER_OS:
|
||
return kOS;
|
||
default:
|
||
MOZ_CRASH("Handle the new result of WidgetInputEvent::AccelModifier()");
|
||
return 0;
|
||
}
|
||
}
|
||
|
||
void
|
||
KeyBinding::ToPlatformFormat(nsAString& aValue) const
|
||
{
|
||
nsCOMPtr<nsIStringBundle> keyStringBundle;
|
||
nsCOMPtr<nsIStringBundleService> stringBundleService =
|
||
mozilla::services::GetStringBundleService();
|
||
if (stringBundleService)
|
||
stringBundleService->CreateBundle(
|
||
"chrome://global-platform/locale/platformKeys.properties",
|
||
getter_AddRefs(keyStringBundle));
|
||
|
||
if (!keyStringBundle)
|
||
return;
|
||
|
||
nsAutoString separator;
|
||
keyStringBundle->GetStringFromName(MOZ_UTF16("MODIFIER_SEPARATOR"),
|
||
getter_Copies(separator));
|
||
|
||
nsAutoString modifierName;
|
||
if (mModifierMask & kControl) {
|
||
keyStringBundle->GetStringFromName(MOZ_UTF16("VK_CONTROL"),
|
||
getter_Copies(modifierName));
|
||
|
||
aValue.Append(modifierName);
|
||
aValue.Append(separator);
|
||
}
|
||
|
||
if (mModifierMask & kAlt) {
|
||
keyStringBundle->GetStringFromName(MOZ_UTF16("VK_ALT"),
|
||
getter_Copies(modifierName));
|
||
|
||
aValue.Append(modifierName);
|
||
aValue.Append(separator);
|
||
}
|
||
|
||
if (mModifierMask & kShift) {
|
||
keyStringBundle->GetStringFromName(MOZ_UTF16("VK_SHIFT"),
|
||
getter_Copies(modifierName));
|
||
|
||
aValue.Append(modifierName);
|
||
aValue.Append(separator);
|
||
}
|
||
|
||
if (mModifierMask & kMeta) {
|
||
keyStringBundle->GetStringFromName(MOZ_UTF16("VK_META"),
|
||
getter_Copies(modifierName));
|
||
|
||
aValue.Append(modifierName);
|
||
aValue.Append(separator);
|
||
}
|
||
|
||
aValue.Append(mKey);
|
||
}
|
||
|
||
void
|
||
KeyBinding::ToAtkFormat(nsAString& aValue) const
|
||
{
|
||
nsAutoString modifierName;
|
||
if (mModifierMask & kControl)
|
||
aValue.AppendLiteral("<Control>");
|
||
|
||
if (mModifierMask & kAlt)
|
||
aValue.AppendLiteral("<Alt>");
|
||
|
||
if (mModifierMask & kShift)
|
||
aValue.AppendLiteral("<Shift>");
|
||
|
||
if (mModifierMask & kMeta)
|
||
aValue.AppendLiteral("<Meta>");
|
||
|
||
aValue.Append(mKey);
|
||
}
|
||
|